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Mp00256: Decorated permutations upper permutationPermutations
St000021: Permutations ⟶ ℤResult quality: 100% values known / values provided: 100%distinct values known / distinct values provided: 100%
Values
[+] => [1] => 0
[-] => [1] => 0
[3,+,1] => [2,3,1] => 1
[3,-,1] => [3,1,2] => 1
[+,4,+,2] => [1,3,4,2] => 1
[-,4,+,2] => [3,4,1,2] => 1
[+,4,-,2] => [1,4,2,3] => 1
[-,4,-,2] => [4,1,2,3] => 1
[2,4,+,1] => [3,4,1,2] => 1
[2,4,-,1] => [4,1,2,3] => 1
[3,4,2,1] => [3,4,1,2] => 1
[4,1,+,2] => [2,3,4,1] => 1
[4,1,-,2] => [2,4,1,3] => 1
[4,+,+,1] => [2,3,4,1] => 1
[4,-,+,1] => [3,4,1,2] => 1
[4,+,-,1] => [2,4,1,3] => 1
[4,-,-,1] => [4,1,2,3] => 1
[4,3,2,1] => [3,4,1,2] => 1
[+,+,5,+,3] => [1,2,4,5,3] => 1
[-,+,5,+,3] => [2,4,5,1,3] => 1
[+,-,5,+,3] => [1,4,5,2,3] => 1
[+,+,5,-,3] => [1,2,5,3,4] => 1
[-,-,5,+,3] => [4,5,1,2,3] => 1
[-,+,5,-,3] => [2,5,1,3,4] => 1
[+,-,5,-,3] => [1,5,2,3,4] => 1
[-,-,5,-,3] => [5,1,2,3,4] => 1
[+,3,5,+,2] => [1,4,5,2,3] => 1
[-,3,5,+,2] => [4,5,1,2,3] => 1
[+,3,5,-,2] => [1,5,2,3,4] => 1
[-,3,5,-,2] => [5,1,2,3,4] => 1
[+,4,5,3,2] => [1,4,5,2,3] => 1
[-,4,5,3,2] => [4,5,1,2,3] => 1
[+,5,2,+,3] => [1,3,4,5,2] => 1
[-,5,2,+,3] => [3,4,5,1,2] => 1
[+,5,2,-,3] => [1,3,5,2,4] => 1
[-,5,2,-,3] => [3,5,1,2,4] => 1
[+,5,+,+,2] => [1,3,4,5,2] => 1
[-,5,+,+,2] => [3,4,5,1,2] => 1
[+,5,-,+,2] => [1,4,5,2,3] => 1
[+,5,+,-,2] => [1,3,5,2,4] => 1
[-,5,-,+,2] => [4,5,1,2,3] => 1
[-,5,+,-,2] => [3,5,1,2,4] => 1
[+,5,-,-,2] => [1,5,2,3,4] => 1
[-,5,-,-,2] => [5,1,2,3,4] => 1
[+,5,4,3,2] => [1,4,5,2,3] => 1
[-,5,4,3,2] => [4,5,1,2,3] => 1
[2,1,5,+,3] => [2,4,5,1,3] => 1
[2,1,5,-,3] => [2,5,1,3,4] => 1
[2,3,5,+,1] => [4,5,1,2,3] => 1
[2,3,5,-,1] => [5,1,2,3,4] => 1
Description
The number of descents of a permutation. This can be described as an occurrence of the vincular mesh pattern ([2,1], {(1,0),(1,1),(1,2)}), i.e., the middle column is shaded, see [3].
Mp00256: Decorated permutations upper permutationPermutations
St000035: Permutations ⟶ ℤResult quality: 100% values known / values provided: 100%distinct values known / distinct values provided: 100%
Values
[+] => [1] => 0
[-] => [1] => 0
[3,+,1] => [2,3,1] => 1
[3,-,1] => [3,1,2] => 1
[+,4,+,2] => [1,3,4,2] => 1
[-,4,+,2] => [3,4,1,2] => 1
[+,4,-,2] => [1,4,2,3] => 1
[-,4,-,2] => [4,1,2,3] => 1
[2,4,+,1] => [3,4,1,2] => 1
[2,4,-,1] => [4,1,2,3] => 1
[3,4,2,1] => [3,4,1,2] => 1
[4,1,+,2] => [2,3,4,1] => 1
[4,1,-,2] => [2,4,1,3] => 1
[4,+,+,1] => [2,3,4,1] => 1
[4,-,+,1] => [3,4,1,2] => 1
[4,+,-,1] => [2,4,1,3] => 1
[4,-,-,1] => [4,1,2,3] => 1
[4,3,2,1] => [3,4,1,2] => 1
[+,+,5,+,3] => [1,2,4,5,3] => 1
[-,+,5,+,3] => [2,4,5,1,3] => 1
[+,-,5,+,3] => [1,4,5,2,3] => 1
[+,+,5,-,3] => [1,2,5,3,4] => 1
[-,-,5,+,3] => [4,5,1,2,3] => 1
[-,+,5,-,3] => [2,5,1,3,4] => 1
[+,-,5,-,3] => [1,5,2,3,4] => 1
[-,-,5,-,3] => [5,1,2,3,4] => 1
[+,3,5,+,2] => [1,4,5,2,3] => 1
[-,3,5,+,2] => [4,5,1,2,3] => 1
[+,3,5,-,2] => [1,5,2,3,4] => 1
[-,3,5,-,2] => [5,1,2,3,4] => 1
[+,4,5,3,2] => [1,4,5,2,3] => 1
[-,4,5,3,2] => [4,5,1,2,3] => 1
[+,5,2,+,3] => [1,3,4,5,2] => 1
[-,5,2,+,3] => [3,4,5,1,2] => 1
[+,5,2,-,3] => [1,3,5,2,4] => 1
[-,5,2,-,3] => [3,5,1,2,4] => 1
[+,5,+,+,2] => [1,3,4,5,2] => 1
[-,5,+,+,2] => [3,4,5,1,2] => 1
[+,5,-,+,2] => [1,4,5,2,3] => 1
[+,5,+,-,2] => [1,3,5,2,4] => 1
[-,5,-,+,2] => [4,5,1,2,3] => 1
[-,5,+,-,2] => [3,5,1,2,4] => 1
[+,5,-,-,2] => [1,5,2,3,4] => 1
[-,5,-,-,2] => [5,1,2,3,4] => 1
[+,5,4,3,2] => [1,4,5,2,3] => 1
[-,5,4,3,2] => [4,5,1,2,3] => 1
[2,1,5,+,3] => [2,4,5,1,3] => 1
[2,1,5,-,3] => [2,5,1,3,4] => 1
[2,3,5,+,1] => [4,5,1,2,3] => 1
[2,3,5,-,1] => [5,1,2,3,4] => 1
Description
The number of left outer peaks of a permutation. A left outer peak in a permutation w=[w1,...,wn] is either a position i such that wi1<wi>wi+1 or 1 if w1>w2. In other words, it is a peak in the word [0,w1,...,wn]. This appears in [1, def.3.1]. The joint distribution with [[St000366]] is studied in [3], where left outer peaks are called ''exterior peaks''.
Mp00256: Decorated permutations upper permutationPermutations
St000333: Permutations ⟶ ℤResult quality: 100% values known / values provided: 100%distinct values known / distinct values provided: 100%
Values
[+] => [1] => 0
[-] => [1] => 0
[3,+,1] => [2,3,1] => 1
[3,-,1] => [3,1,2] => 1
[+,4,+,2] => [1,3,4,2] => 1
[-,4,+,2] => [3,4,1,2] => 1
[+,4,-,2] => [1,4,2,3] => 1
[-,4,-,2] => [4,1,2,3] => 1
[2,4,+,1] => [3,4,1,2] => 1
[2,4,-,1] => [4,1,2,3] => 1
[3,4,2,1] => [3,4,1,2] => 1
[4,1,+,2] => [2,3,4,1] => 1
[4,1,-,2] => [2,4,1,3] => 1
[4,+,+,1] => [2,3,4,1] => 1
[4,-,+,1] => [3,4,1,2] => 1
[4,+,-,1] => [2,4,1,3] => 1
[4,-,-,1] => [4,1,2,3] => 1
[4,3,2,1] => [3,4,1,2] => 1
[+,+,5,+,3] => [1,2,4,5,3] => 1
[-,+,5,+,3] => [2,4,5,1,3] => 1
[+,-,5,+,3] => [1,4,5,2,3] => 1
[+,+,5,-,3] => [1,2,5,3,4] => 1
[-,-,5,+,3] => [4,5,1,2,3] => 1
[-,+,5,-,3] => [2,5,1,3,4] => 1
[+,-,5,-,3] => [1,5,2,3,4] => 1
[-,-,5,-,3] => [5,1,2,3,4] => 1
[+,3,5,+,2] => [1,4,5,2,3] => 1
[-,3,5,+,2] => [4,5,1,2,3] => 1
[+,3,5,-,2] => [1,5,2,3,4] => 1
[-,3,5,-,2] => [5,1,2,3,4] => 1
[+,4,5,3,2] => [1,4,5,2,3] => 1
[-,4,5,3,2] => [4,5,1,2,3] => 1
[+,5,2,+,3] => [1,3,4,5,2] => 1
[-,5,2,+,3] => [3,4,5,1,2] => 1
[+,5,2,-,3] => [1,3,5,2,4] => 1
[-,5,2,-,3] => [3,5,1,2,4] => 1
[+,5,+,+,2] => [1,3,4,5,2] => 1
[-,5,+,+,2] => [3,4,5,1,2] => 1
[+,5,-,+,2] => [1,4,5,2,3] => 1
[+,5,+,-,2] => [1,3,5,2,4] => 1
[-,5,-,+,2] => [4,5,1,2,3] => 1
[-,5,+,-,2] => [3,5,1,2,4] => 1
[+,5,-,-,2] => [1,5,2,3,4] => 1
[-,5,-,-,2] => [5,1,2,3,4] => 1
[+,5,4,3,2] => [1,4,5,2,3] => 1
[-,5,4,3,2] => [4,5,1,2,3] => 1
[2,1,5,+,3] => [2,4,5,1,3] => 1
[2,1,5,-,3] => [2,5,1,3,4] => 1
[2,3,5,+,1] => [4,5,1,2,3] => 1
[2,3,5,-,1] => [5,1,2,3,4] => 1
Description
The dez statistic, the number of descents of a permutation after replacing fixed points by zeros. This descent set is denoted by ZDer(σ) in [1].
Mp00256: Decorated permutations upper permutationPermutations
St000647: Permutations ⟶ ℤResult quality: 100% values known / values provided: 100%distinct values known / distinct values provided: 100%
Values
[+] => [1] => 0
[-] => [1] => 0
[3,+,1] => [2,3,1] => 1
[3,-,1] => [3,1,2] => 1
[+,4,+,2] => [1,3,4,2] => 1
[-,4,+,2] => [3,4,1,2] => 1
[+,4,-,2] => [1,4,2,3] => 1
[-,4,-,2] => [4,1,2,3] => 1
[2,4,+,1] => [3,4,1,2] => 1
[2,4,-,1] => [4,1,2,3] => 1
[3,4,2,1] => [3,4,1,2] => 1
[4,1,+,2] => [2,3,4,1] => 1
[4,1,-,2] => [2,4,1,3] => 1
[4,+,+,1] => [2,3,4,1] => 1
[4,-,+,1] => [3,4,1,2] => 1
[4,+,-,1] => [2,4,1,3] => 1
[4,-,-,1] => [4,1,2,3] => 1
[4,3,2,1] => [3,4,1,2] => 1
[+,+,5,+,3] => [1,2,4,5,3] => 1
[-,+,5,+,3] => [2,4,5,1,3] => 1
[+,-,5,+,3] => [1,4,5,2,3] => 1
[+,+,5,-,3] => [1,2,5,3,4] => 1
[-,-,5,+,3] => [4,5,1,2,3] => 1
[-,+,5,-,3] => [2,5,1,3,4] => 1
[+,-,5,-,3] => [1,5,2,3,4] => 1
[-,-,5,-,3] => [5,1,2,3,4] => 1
[+,3,5,+,2] => [1,4,5,2,3] => 1
[-,3,5,+,2] => [4,5,1,2,3] => 1
[+,3,5,-,2] => [1,5,2,3,4] => 1
[-,3,5,-,2] => [5,1,2,3,4] => 1
[+,4,5,3,2] => [1,4,5,2,3] => 1
[-,4,5,3,2] => [4,5,1,2,3] => 1
[+,5,2,+,3] => [1,3,4,5,2] => 1
[-,5,2,+,3] => [3,4,5,1,2] => 1
[+,5,2,-,3] => [1,3,5,2,4] => 1
[-,5,2,-,3] => [3,5,1,2,4] => 1
[+,5,+,+,2] => [1,3,4,5,2] => 1
[-,5,+,+,2] => [3,4,5,1,2] => 1
[+,5,-,+,2] => [1,4,5,2,3] => 1
[+,5,+,-,2] => [1,3,5,2,4] => 1
[-,5,-,+,2] => [4,5,1,2,3] => 1
[-,5,+,-,2] => [3,5,1,2,4] => 1
[+,5,-,-,2] => [1,5,2,3,4] => 1
[-,5,-,-,2] => [5,1,2,3,4] => 1
[+,5,4,3,2] => [1,4,5,2,3] => 1
[-,5,4,3,2] => [4,5,1,2,3] => 1
[2,1,5,+,3] => [2,4,5,1,3] => 1
[2,1,5,-,3] => [2,5,1,3,4] => 1
[2,3,5,+,1] => [4,5,1,2,3] => 1
[2,3,5,-,1] => [5,1,2,3,4] => 1
Description
The number of big descents of a permutation. For a permutation π, this is the number of indices i such that π(i)π(i+1)>1. The generating functions of big descents is equal to the generating function of (normal) descents after sending a permutation from cycle to one-line notation [[Mp00090]], see [Theorem 2.5, 1]. For the number of small descents, see [[St000214]].
Mp00256: Decorated permutations upper permutationPermutations
St000884: Permutations ⟶ ℤResult quality: 100% values known / values provided: 100%distinct values known / distinct values provided: 100%
Values
[+] => [1] => 0
[-] => [1] => 0
[3,+,1] => [2,3,1] => 1
[3,-,1] => [3,1,2] => 1
[+,4,+,2] => [1,3,4,2] => 1
[-,4,+,2] => [3,4,1,2] => 1
[+,4,-,2] => [1,4,2,3] => 1
[-,4,-,2] => [4,1,2,3] => 1
[2,4,+,1] => [3,4,1,2] => 1
[2,4,-,1] => [4,1,2,3] => 1
[3,4,2,1] => [3,4,1,2] => 1
[4,1,+,2] => [2,3,4,1] => 1
[4,1,-,2] => [2,4,1,3] => 1
[4,+,+,1] => [2,3,4,1] => 1
[4,-,+,1] => [3,4,1,2] => 1
[4,+,-,1] => [2,4,1,3] => 1
[4,-,-,1] => [4,1,2,3] => 1
[4,3,2,1] => [3,4,1,2] => 1
[+,+,5,+,3] => [1,2,4,5,3] => 1
[-,+,5,+,3] => [2,4,5,1,3] => 1
[+,-,5,+,3] => [1,4,5,2,3] => 1
[+,+,5,-,3] => [1,2,5,3,4] => 1
[-,-,5,+,3] => [4,5,1,2,3] => 1
[-,+,5,-,3] => [2,5,1,3,4] => 1
[+,-,5,-,3] => [1,5,2,3,4] => 1
[-,-,5,-,3] => [5,1,2,3,4] => 1
[+,3,5,+,2] => [1,4,5,2,3] => 1
[-,3,5,+,2] => [4,5,1,2,3] => 1
[+,3,5,-,2] => [1,5,2,3,4] => 1
[-,3,5,-,2] => [5,1,2,3,4] => 1
[+,4,5,3,2] => [1,4,5,2,3] => 1
[-,4,5,3,2] => [4,5,1,2,3] => 1
[+,5,2,+,3] => [1,3,4,5,2] => 1
[-,5,2,+,3] => [3,4,5,1,2] => 1
[+,5,2,-,3] => [1,3,5,2,4] => 1
[-,5,2,-,3] => [3,5,1,2,4] => 1
[+,5,+,+,2] => [1,3,4,5,2] => 1
[-,5,+,+,2] => [3,4,5,1,2] => 1
[+,5,-,+,2] => [1,4,5,2,3] => 1
[+,5,+,-,2] => [1,3,5,2,4] => 1
[-,5,-,+,2] => [4,5,1,2,3] => 1
[-,5,+,-,2] => [3,5,1,2,4] => 1
[+,5,-,-,2] => [1,5,2,3,4] => 1
[-,5,-,-,2] => [5,1,2,3,4] => 1
[+,5,4,3,2] => [1,4,5,2,3] => 1
[-,5,4,3,2] => [4,5,1,2,3] => 1
[2,1,5,+,3] => [2,4,5,1,3] => 1
[2,1,5,-,3] => [2,5,1,3,4] => 1
[2,3,5,+,1] => [4,5,1,2,3] => 1
[2,3,5,-,1] => [5,1,2,3,4] => 1
Description
The number of isolated descents of a permutation. A descent i is isolated if neither i+1 nor i1 are descents. If a permutation has only isolated descents, then it is called primitive in [1].
Mp00256: Decorated permutations upper permutationPermutations
St001665: Permutations ⟶ ℤResult quality: 100% values known / values provided: 100%distinct values known / distinct values provided: 100%
Values
[+] => [1] => 0
[-] => [1] => 0
[3,+,1] => [2,3,1] => 1
[3,-,1] => [3,1,2] => 1
[+,4,+,2] => [1,3,4,2] => 1
[-,4,+,2] => [3,4,1,2] => 1
[+,4,-,2] => [1,4,2,3] => 1
[-,4,-,2] => [4,1,2,3] => 1
[2,4,+,1] => [3,4,1,2] => 1
[2,4,-,1] => [4,1,2,3] => 1
[3,4,2,1] => [3,4,1,2] => 1
[4,1,+,2] => [2,3,4,1] => 1
[4,1,-,2] => [2,4,1,3] => 1
[4,+,+,1] => [2,3,4,1] => 1
[4,-,+,1] => [3,4,1,2] => 1
[4,+,-,1] => [2,4,1,3] => 1
[4,-,-,1] => [4,1,2,3] => 1
[4,3,2,1] => [3,4,1,2] => 1
[+,+,5,+,3] => [1,2,4,5,3] => 1
[-,+,5,+,3] => [2,4,5,1,3] => 1
[+,-,5,+,3] => [1,4,5,2,3] => 1
[+,+,5,-,3] => [1,2,5,3,4] => 1
[-,-,5,+,3] => [4,5,1,2,3] => 1
[-,+,5,-,3] => [2,5,1,3,4] => 1
[+,-,5,-,3] => [1,5,2,3,4] => 1
[-,-,5,-,3] => [5,1,2,3,4] => 1
[+,3,5,+,2] => [1,4,5,2,3] => 1
[-,3,5,+,2] => [4,5,1,2,3] => 1
[+,3,5,-,2] => [1,5,2,3,4] => 1
[-,3,5,-,2] => [5,1,2,3,4] => 1
[+,4,5,3,2] => [1,4,5,2,3] => 1
[-,4,5,3,2] => [4,5,1,2,3] => 1
[+,5,2,+,3] => [1,3,4,5,2] => 1
[-,5,2,+,3] => [3,4,5,1,2] => 1
[+,5,2,-,3] => [1,3,5,2,4] => 1
[-,5,2,-,3] => [3,5,1,2,4] => 1
[+,5,+,+,2] => [1,3,4,5,2] => 1
[-,5,+,+,2] => [3,4,5,1,2] => 1
[+,5,-,+,2] => [1,4,5,2,3] => 1
[+,5,+,-,2] => [1,3,5,2,4] => 1
[-,5,-,+,2] => [4,5,1,2,3] => 1
[-,5,+,-,2] => [3,5,1,2,4] => 1
[+,5,-,-,2] => [1,5,2,3,4] => 1
[-,5,-,-,2] => [5,1,2,3,4] => 1
[+,5,4,3,2] => [1,4,5,2,3] => 1
[-,5,4,3,2] => [4,5,1,2,3] => 1
[2,1,5,+,3] => [2,4,5,1,3] => 1
[2,1,5,-,3] => [2,5,1,3,4] => 1
[2,3,5,+,1] => [4,5,1,2,3] => 1
[2,3,5,-,1] => [5,1,2,3,4] => 1
Description
The number of pure excedances of a permutation. A pure excedance of a permutation π is a position i<πi such that there is no j<i with iπj<πi.
Mp00256: Decorated permutations upper permutationPermutations
St001729: Permutations ⟶ ℤResult quality: 100% values known / values provided: 100%distinct values known / distinct values provided: 100%
Values
[+] => [1] => 0
[-] => [1] => 0
[3,+,1] => [2,3,1] => 1
[3,-,1] => [3,1,2] => 1
[+,4,+,2] => [1,3,4,2] => 1
[-,4,+,2] => [3,4,1,2] => 1
[+,4,-,2] => [1,4,2,3] => 1
[-,4,-,2] => [4,1,2,3] => 1
[2,4,+,1] => [3,4,1,2] => 1
[2,4,-,1] => [4,1,2,3] => 1
[3,4,2,1] => [3,4,1,2] => 1
[4,1,+,2] => [2,3,4,1] => 1
[4,1,-,2] => [2,4,1,3] => 1
[4,+,+,1] => [2,3,4,1] => 1
[4,-,+,1] => [3,4,1,2] => 1
[4,+,-,1] => [2,4,1,3] => 1
[4,-,-,1] => [4,1,2,3] => 1
[4,3,2,1] => [3,4,1,2] => 1
[+,+,5,+,3] => [1,2,4,5,3] => 1
[-,+,5,+,3] => [2,4,5,1,3] => 1
[+,-,5,+,3] => [1,4,5,2,3] => 1
[+,+,5,-,3] => [1,2,5,3,4] => 1
[-,-,5,+,3] => [4,5,1,2,3] => 1
[-,+,5,-,3] => [2,5,1,3,4] => 1
[+,-,5,-,3] => [1,5,2,3,4] => 1
[-,-,5,-,3] => [5,1,2,3,4] => 1
[+,3,5,+,2] => [1,4,5,2,3] => 1
[-,3,5,+,2] => [4,5,1,2,3] => 1
[+,3,5,-,2] => [1,5,2,3,4] => 1
[-,3,5,-,2] => [5,1,2,3,4] => 1
[+,4,5,3,2] => [1,4,5,2,3] => 1
[-,4,5,3,2] => [4,5,1,2,3] => 1
[+,5,2,+,3] => [1,3,4,5,2] => 1
[-,5,2,+,3] => [3,4,5,1,2] => 1
[+,5,2,-,3] => [1,3,5,2,4] => 1
[-,5,2,-,3] => [3,5,1,2,4] => 1
[+,5,+,+,2] => [1,3,4,5,2] => 1
[-,5,+,+,2] => [3,4,5,1,2] => 1
[+,5,-,+,2] => [1,4,5,2,3] => 1
[+,5,+,-,2] => [1,3,5,2,4] => 1
[-,5,-,+,2] => [4,5,1,2,3] => 1
[-,5,+,-,2] => [3,5,1,2,4] => 1
[+,5,-,-,2] => [1,5,2,3,4] => 1
[-,5,-,-,2] => [5,1,2,3,4] => 1
[+,5,4,3,2] => [1,4,5,2,3] => 1
[-,5,4,3,2] => [4,5,1,2,3] => 1
[2,1,5,+,3] => [2,4,5,1,3] => 1
[2,1,5,-,3] => [2,5,1,3,4] => 1
[2,3,5,+,1] => [4,5,1,2,3] => 1
[2,3,5,-,1] => [5,1,2,3,4] => 1
Description
The number of visible descents of a permutation. A visible descent of a permutation π is a position i such that π(i+1)min.
Mp00256: Decorated permutations upper permutationPermutations
St001737: Permutations ⟶ ℤResult quality: 100% values known / values provided: 100%distinct values known / distinct values provided: 100%
Values
[+] => [1] => 0
[-] => [1] => 0
[3,+,1] => [2,3,1] => 1
[3,-,1] => [3,1,2] => 1
[+,4,+,2] => [1,3,4,2] => 1
[-,4,+,2] => [3,4,1,2] => 1
[+,4,-,2] => [1,4,2,3] => 1
[-,4,-,2] => [4,1,2,3] => 1
[2,4,+,1] => [3,4,1,2] => 1
[2,4,-,1] => [4,1,2,3] => 1
[3,4,2,1] => [3,4,1,2] => 1
[4,1,+,2] => [2,3,4,1] => 1
[4,1,-,2] => [2,4,1,3] => 1
[4,+,+,1] => [2,3,4,1] => 1
[4,-,+,1] => [3,4,1,2] => 1
[4,+,-,1] => [2,4,1,3] => 1
[4,-,-,1] => [4,1,2,3] => 1
[4,3,2,1] => [3,4,1,2] => 1
[+,+,5,+,3] => [1,2,4,5,3] => 1
[-,+,5,+,3] => [2,4,5,1,3] => 1
[+,-,5,+,3] => [1,4,5,2,3] => 1
[+,+,5,-,3] => [1,2,5,3,4] => 1
[-,-,5,+,3] => [4,5,1,2,3] => 1
[-,+,5,-,3] => [2,5,1,3,4] => 1
[+,-,5,-,3] => [1,5,2,3,4] => 1
[-,-,5,-,3] => [5,1,2,3,4] => 1
[+,3,5,+,2] => [1,4,5,2,3] => 1
[-,3,5,+,2] => [4,5,1,2,3] => 1
[+,3,5,-,2] => [1,5,2,3,4] => 1
[-,3,5,-,2] => [5,1,2,3,4] => 1
[+,4,5,3,2] => [1,4,5,2,3] => 1
[-,4,5,3,2] => [4,5,1,2,3] => 1
[+,5,2,+,3] => [1,3,4,5,2] => 1
[-,5,2,+,3] => [3,4,5,1,2] => 1
[+,5,2,-,3] => [1,3,5,2,4] => 1
[-,5,2,-,3] => [3,5,1,2,4] => 1
[+,5,+,+,2] => [1,3,4,5,2] => 1
[-,5,+,+,2] => [3,4,5,1,2] => 1
[+,5,-,+,2] => [1,4,5,2,3] => 1
[+,5,+,-,2] => [1,3,5,2,4] => 1
[-,5,-,+,2] => [4,5,1,2,3] => 1
[-,5,+,-,2] => [3,5,1,2,4] => 1
[+,5,-,-,2] => [1,5,2,3,4] => 1
[-,5,-,-,2] => [5,1,2,3,4] => 1
[+,5,4,3,2] => [1,4,5,2,3] => 1
[-,5,4,3,2] => [4,5,1,2,3] => 1
[2,1,5,+,3] => [2,4,5,1,3] => 1
[2,1,5,-,3] => [2,5,1,3,4] => 1
[2,3,5,+,1] => [4,5,1,2,3] => 1
[2,3,5,-,1] => [5,1,2,3,4] => 1
Description
The number of descents of type 2 in a permutation. A position i\in[1,n-1] is a descent of type 2 of a permutation \pi of n letters, if it is a descent and if \pi(j) < \pi(i) for all j < i.
Mp00256: Decorated permutations upper permutationPermutations
St001928: Permutations ⟶ ℤResult quality: 100% values known / values provided: 100%distinct values known / distinct values provided: 100%
Values
[+] => [1] => 0
[-] => [1] => 0
[3,+,1] => [2,3,1] => 1
[3,-,1] => [3,1,2] => 1
[+,4,+,2] => [1,3,4,2] => 1
[-,4,+,2] => [3,4,1,2] => 1
[+,4,-,2] => [1,4,2,3] => 1
[-,4,-,2] => [4,1,2,3] => 1
[2,4,+,1] => [3,4,1,2] => 1
[2,4,-,1] => [4,1,2,3] => 1
[3,4,2,1] => [3,4,1,2] => 1
[4,1,+,2] => [2,3,4,1] => 1
[4,1,-,2] => [2,4,1,3] => 1
[4,+,+,1] => [2,3,4,1] => 1
[4,-,+,1] => [3,4,1,2] => 1
[4,+,-,1] => [2,4,1,3] => 1
[4,-,-,1] => [4,1,2,3] => 1
[4,3,2,1] => [3,4,1,2] => 1
[+,+,5,+,3] => [1,2,4,5,3] => 1
[-,+,5,+,3] => [2,4,5,1,3] => 1
[+,-,5,+,3] => [1,4,5,2,3] => 1
[+,+,5,-,3] => [1,2,5,3,4] => 1
[-,-,5,+,3] => [4,5,1,2,3] => 1
[-,+,5,-,3] => [2,5,1,3,4] => 1
[+,-,5,-,3] => [1,5,2,3,4] => 1
[-,-,5,-,3] => [5,1,2,3,4] => 1
[+,3,5,+,2] => [1,4,5,2,3] => 1
[-,3,5,+,2] => [4,5,1,2,3] => 1
[+,3,5,-,2] => [1,5,2,3,4] => 1
[-,3,5,-,2] => [5,1,2,3,4] => 1
[+,4,5,3,2] => [1,4,5,2,3] => 1
[-,4,5,3,2] => [4,5,1,2,3] => 1
[+,5,2,+,3] => [1,3,4,5,2] => 1
[-,5,2,+,3] => [3,4,5,1,2] => 1
[+,5,2,-,3] => [1,3,5,2,4] => 1
[-,5,2,-,3] => [3,5,1,2,4] => 1
[+,5,+,+,2] => [1,3,4,5,2] => 1
[-,5,+,+,2] => [3,4,5,1,2] => 1
[+,5,-,+,2] => [1,4,5,2,3] => 1
[+,5,+,-,2] => [1,3,5,2,4] => 1
[-,5,-,+,2] => [4,5,1,2,3] => 1
[-,5,+,-,2] => [3,5,1,2,4] => 1
[+,5,-,-,2] => [1,5,2,3,4] => 1
[-,5,-,-,2] => [5,1,2,3,4] => 1
[+,5,4,3,2] => [1,4,5,2,3] => 1
[-,5,4,3,2] => [4,5,1,2,3] => 1
[2,1,5,+,3] => [2,4,5,1,3] => 1
[2,1,5,-,3] => [2,5,1,3,4] => 1
[2,3,5,+,1] => [4,5,1,2,3] => 1
[2,3,5,-,1] => [5,1,2,3,4] => 1
Description
The number of non-overlapping descents in a permutation. In other words, any maximal descending subsequence \pi_i,\pi_{i+1},\dots,\pi_k contributes \lfloor\frac{k-i+1}{2}\rfloor to the total count.
Mp00256: Decorated permutations upper permutationPermutations
St000007: Permutations ⟶ ℤResult quality: 100% values known / values provided: 100%distinct values known / distinct values provided: 100%
Values
[+] => [1] => 1 = 0 + 1
[-] => [1] => 1 = 0 + 1
[3,+,1] => [2,3,1] => 2 = 1 + 1
[3,-,1] => [3,1,2] => 2 = 1 + 1
[+,4,+,2] => [1,3,4,2] => 2 = 1 + 1
[-,4,+,2] => [3,4,1,2] => 2 = 1 + 1
[+,4,-,2] => [1,4,2,3] => 2 = 1 + 1
[-,4,-,2] => [4,1,2,3] => 2 = 1 + 1
[2,4,+,1] => [3,4,1,2] => 2 = 1 + 1
[2,4,-,1] => [4,1,2,3] => 2 = 1 + 1
[3,4,2,1] => [3,4,1,2] => 2 = 1 + 1
[4,1,+,2] => [2,3,4,1] => 2 = 1 + 1
[4,1,-,2] => [2,4,1,3] => 2 = 1 + 1
[4,+,+,1] => [2,3,4,1] => 2 = 1 + 1
[4,-,+,1] => [3,4,1,2] => 2 = 1 + 1
[4,+,-,1] => [2,4,1,3] => 2 = 1 + 1
[4,-,-,1] => [4,1,2,3] => 2 = 1 + 1
[4,3,2,1] => [3,4,1,2] => 2 = 1 + 1
[+,+,5,+,3] => [1,2,4,5,3] => 2 = 1 + 1
[-,+,5,+,3] => [2,4,5,1,3] => 2 = 1 + 1
[+,-,5,+,3] => [1,4,5,2,3] => 2 = 1 + 1
[+,+,5,-,3] => [1,2,5,3,4] => 2 = 1 + 1
[-,-,5,+,3] => [4,5,1,2,3] => 2 = 1 + 1
[-,+,5,-,3] => [2,5,1,3,4] => 2 = 1 + 1
[+,-,5,-,3] => [1,5,2,3,4] => 2 = 1 + 1
[-,-,5,-,3] => [5,1,2,3,4] => 2 = 1 + 1
[+,3,5,+,2] => [1,4,5,2,3] => 2 = 1 + 1
[-,3,5,+,2] => [4,5,1,2,3] => 2 = 1 + 1
[+,3,5,-,2] => [1,5,2,3,4] => 2 = 1 + 1
[-,3,5,-,2] => [5,1,2,3,4] => 2 = 1 + 1
[+,4,5,3,2] => [1,4,5,2,3] => 2 = 1 + 1
[-,4,5,3,2] => [4,5,1,2,3] => 2 = 1 + 1
[+,5,2,+,3] => [1,3,4,5,2] => 2 = 1 + 1
[-,5,2,+,3] => [3,4,5,1,2] => 2 = 1 + 1
[+,5,2,-,3] => [1,3,5,2,4] => 2 = 1 + 1
[-,5,2,-,3] => [3,5,1,2,4] => 2 = 1 + 1
[+,5,+,+,2] => [1,3,4,5,2] => 2 = 1 + 1
[-,5,+,+,2] => [3,4,5,1,2] => 2 = 1 + 1
[+,5,-,+,2] => [1,4,5,2,3] => 2 = 1 + 1
[+,5,+,-,2] => [1,3,5,2,4] => 2 = 1 + 1
[-,5,-,+,2] => [4,5,1,2,3] => 2 = 1 + 1
[-,5,+,-,2] => [3,5,1,2,4] => 2 = 1 + 1
[+,5,-,-,2] => [1,5,2,3,4] => 2 = 1 + 1
[-,5,-,-,2] => [5,1,2,3,4] => 2 = 1 + 1
[+,5,4,3,2] => [1,4,5,2,3] => 2 = 1 + 1
[-,5,4,3,2] => [4,5,1,2,3] => 2 = 1 + 1
[2,1,5,+,3] => [2,4,5,1,3] => 2 = 1 + 1
[2,1,5,-,3] => [2,5,1,3,4] => 2 = 1 + 1
[2,3,5,+,1] => [4,5,1,2,3] => 2 = 1 + 1
[2,3,5,-,1] => [5,1,2,3,4] => 2 = 1 + 1
Description
The number of saliances of the permutation. A saliance is a right-to-left maximum. This can be described as an occurrence of the mesh pattern ([1], {(1,1)}), i.e., the upper right quadrant is shaded, see [1].
The following 481 statistics, ordered by result quality, also match your data. Click on any of them to see the details.
St000325The width of the tree associated to a permutation. St000470The number of runs in a permutation. St001741The largest integer such that all patterns of this size are contained in the permutation. St000028The number of stack-sorts needed to sort a permutation. St000142The number of even parts of a partition. St000155The number of exceedances (also excedences) of a permutation. St000157The number of descents of a standard tableau. St000162The number of nontrivial cycles in the cycle decomposition of a permutation. St000225Difference between largest and smallest parts in a partition. St000245The number of ascents of a permutation. St000319The spin of an integer partition. St000320The dinv adjustment of an integer partition. St000374The number of exclusive right-to-left minima of a permutation. St000480The number of lower covers of a partition in dominance order. St000481The number of upper covers of a partition in dominance order. St000535The rank-width of a graph. St000632The jump number of the poset. St000662The staircase size of the code of a permutation. St000663The number of right floats of a permutation. St000703The number of deficiencies of a permutation. St000834The number of right outer peaks of a permutation. St000994The number of cycle peaks and the number of cycle valleys of a permutation. St000996The number of exclusive left-to-right maxima of a permutation. St001092The number of distinct even parts of a partition. St001194The injective dimension of A/AfA in the corresponding Nakayama algebra A when Af is the minimal faithful projective-injective left A-module St001214The aft of an integer partition. St001251The number of parts of a partition that are not congruent 1 modulo 3. St001252Half the sum of the even parts of a partition. St001269The sum of the minimum of the number of exceedances and deficiencies in each cycle of a permutation. St001280The number of parts of an integer partition that are at least two. St001333The cardinality of a minimal edge-isolating set of a graph. St001393The induced matching number of a graph. St001427The number of descents of a signed permutation. St001440The number of standard Young tableaux whose major index is congruent one modulo the size of a given integer partition. St001469The holeyness of a permutation. St001587Half of the largest even part of an integer partition. St001588The number of distinct odd parts smaller than the largest even part in an integer partition. St001657The number of twos in an integer partition. St001761The maximal multiplicity of a letter in a reduced word of a permutation. St001918The degree of the cyclic sieving polynomial corresponding to an integer partition. St000010The length of the partition. St000058The order of a permutation. St000062The length of the longest increasing subsequence of the permutation. St000069The number of maximal elements of a poset. St000097The order of the largest clique of the graph. St000098The chromatic number of a graph. St000147The largest part of an integer partition. St000159The number of distinct parts of the integer partition. St000208Number of integral Gelfand-Tsetlin polytopes with prescribed top row and integer partition weight. St000298The order dimension or Dushnik-Miller dimension of a poset. St000308The height of the tree associated to a permutation. St000314The number of left-to-right-maxima of a permutation. St000321The number of integer partitions of n that are dominated by an integer partition. St000345The number of refinements of a partition. St000346The number of coarsenings of a partition. St000527The width of the poset. St000533The minimum of the number of parts and the size of the first part of an integer partition. St000644The number of graphs with given frequency partition. St000755The number of real roots of the characteristic polynomial of a linear recurrence associated with an integer partition. St000783The side length of the largest staircase partition fitting into a partition. St000862The number of parts of the shifted shape of a permutation. St000920The logarithmic height of a Dyck path. St000935The number of ordered refinements of an integer partition. St000991The number of right-to-left minima of a permutation. St001029The size of the core of a graph. St001111The weak 2-dynamic chromatic number of a graph. St001235The global dimension of the corresponding Comp-Nakayama algebra. St001261The Castelnuovo-Mumford regularity of a graph. St001389The number of partitions of the same length below the given integer partition. St001432The order dimension of the partition. St001716The 1-improper chromatic number of a graph. St001734The lettericity of a graph. St001899The total number of irreducible representations contained in the higher Lie character for an integer partition. St001900The number of distinct irreducible representations contained in the higher Lie character for an integer partition. St000318The number of addable cells of the Ferrers diagram of an integer partition. St000759The smallest missing part in an integer partition. St000023The number of inner peaks of a permutation. St000053The number of valleys of the Dyck path. St000080The rank of the poset. St000154The sum of the descent bottoms of a permutation. St000175Degree of the polynomial counting the number of semistandard Young tableaux when stretching the shape. St000185The weighted size of a partition. St000259The diameter of a connected graph. St000260The radius of a connected graph. St000261The edge connectivity of a graph. St000262The vertex connectivity of a graph. St000272The treewidth of a graph. St000306The bounce count of a Dyck path. St000310The minimal degree of a vertex of a graph. St000340The number of non-final maximal constant sub-paths of length greater than one. St000352The Elizalde-Pak rank of a permutation. St000362The size of a minimal vertex cover of a graph. St000387The matching number of a graph. St000473The number of parts of a partition that are strictly bigger than the number of ones. St000506The number of standard desarrangement tableaux of shape equal to the given partition. St000536The pathwidth of a graph. St000547The number of even non-empty partial sums of an integer partition. St000660The number of rises of length at least 3 of a Dyck path. St000688The global dimension minus the dominant dimension of the LNakayama algebra associated to a Dyck path. St000845The maximal number of elements covered by an element in a poset. St000864The number of circled entries of the shifted recording tableau of a permutation. St000970Number of peaks minus the dominant dimension of the corresponding LNakayama algebra. St000985The number of positive eigenvalues of the adjacency matrix of the graph. St001011Number of simple modules of projective dimension 2 in the Nakayama algebra corresponding to the Dyck path. St001026The maximum of the projective dimensions of the indecomposable non-projective injective modules minus the minimum in the Nakayama algebra corresponding to the Dyck path. St001086The number of occurrences of the consecutive pattern 132 in a permutation. St001142The projective dimension of the socle of the regular module as a bimodule in the Nakayama algebra corresponding to the Dyck path. St001169Number of simple modules with projective dimension at least two in the corresponding Nakayama algebra. St001176The size of a partition minus its first part. St001185The number of indecomposable injective modules of grade at least 2 in the corresponding Nakayama algebra. St001188The number of simple modules S with grade \inf \{ i \geq 0 | Ext^i(S,A) \neq 0 \} at least two in the Nakayama algebra A corresponding to the Dyck path. St001192The maximal dimension of Ext_A^2(S,A) for a simple module S over the corresponding Nakayama algebra A. St001197The global dimension of eAe for the corresponding Nakayama algebra A with minimal faithful projective-injective module eA. St001205The number of non-simple indecomposable projective-injective modules of the algebra eAe in the corresponding Nakayama algebra A with minimal faithful projective-injective module eA. St001212The number of simple modules in the corresponding Nakayama algebra that have non-zero second Ext-group with the regular module. St001244The number of simple modules of projective dimension one that are not 1-regular for the Nakayama algebra associated to a Dyck path. St001271The competition number of a graph. St001276The number of 2-regular indecomposable modules in the corresponding Nakayama algebra. St001277The degeneracy of a graph. St001294The maximal torsionfree index of a simple non-projective module in the corresponding Nakayama algebra. St001296The maximal torsionfree index of an indecomposable non-projective module in the corresponding Nakayama algebra. St001335The cardinality of a minimal cycle-isolating set of a graph. St001340The cardinality of a minimal non-edge isolating set of a graph. St001349The number of different graphs obtained from the given graph by removing an edge. St001354The number of series nodes in the modular decomposition of a graph. St001358The largest degree of a regular subgraph of a graph. St001506Half the projective dimension of the unique simple module with even projective dimension in a magnitude 1 Nakayama algebra. St001507The sum of projective dimension of simple modules with even projective dimension divided by 2 in the LNakayama algebra corresponding to Dyck paths. St001512The minimum rank of a graph. St001743The discrepancy of a graph. St001767The largest minimal number of arrows pointing to a cell in the Ferrers diagram in any assignment. St001792The arboricity of a graph. St001812The biclique partition number of a graph. St001942The number of loops of the quiver corresponding to the reduced incidence algebra of a poset. St001961The sum of the greatest common divisors of all pairs of parts. St000015The number of peaks of a Dyck path. St000031The number of cycles in the cycle decomposition of a permutation. St000054The first entry of the permutation. St000068The number of minimal elements in a poset. St000093The cardinality of a maximal independent set of vertices of a graph. St000099The number of valleys of a permutation, including the boundary. St000146The Andrews-Garvan crank of a partition. St000172The Grundy number of a graph. St000213The number of weak exceedances (also weak excedences) of a permutation. St000258The burning number of a graph. St000278The size of the preimage of the map 'to partition' from Integer compositions to Integer partitions. St000288The number of ones in a binary word. St000299The number of nonisomorphic vertex-induced subtrees. St000381The largest part of an integer composition. St000396The register function (or Horton-Strahler number) of a binary tree. St000451The length of the longest pattern of the form k 1 2. St000452The number of distinct eigenvalues of a graph. St000453The number of distinct Laplacian eigenvalues of a graph. St000474Dyson's crank of a partition. St000507The number of ascents of a standard tableau. St000528The height of a poset. St000542The number of left-to-right-minima of a permutation. St000549The number of odd partial sums of an integer partition. St000638The number of up-down runs of a permutation. St000684The global dimension of the LNakayama algebra associated to a Dyck path. St000686The finitistic dominant dimension of a Dyck path. St000777The number of distinct eigenvalues of the distance Laplacian of a connected graph. St000786The maximal number of occurrences of a colour in a proper colouring of a graph. St000808The number of up steps of the associated bargraph. St000810The sum of the entries in the column specified by the partition of the change of basis matrix from powersum symmetric functions to monomial symmetric functions. St000814The sum of the entries in the column specified by the partition of the change of basis matrix from elementary symmetric functions to Schur symmetric functions. St000822The Hadwiger number of the graph. St000903The number of different parts of an integer composition. St000918The 2-limited packing number of a graph. St000955Number of times one has Ext^i(D(A),A)>0 for i>0 for the corresponding LNakayama algebra. St001004The number of indices that are either left-to-right maxima or right-to-left minima. St001068Number of torsionless simple modules in the corresponding Nakayama algebra. St001093The detour number of a graph. St001109The number of proper colourings of a graph with as few colours as possible. St001116The game chromatic number of a graph. St001165Number of simple modules with even projective dimension in the corresponding Nakayama algebra. St001203We associate to a CNakayama algebra (a Nakayama algebra with a cyclic quiver) with Kupisch series L=[c_0,c_1,...,c_{n-1}] such that n=c_0 < c_i for all i > 0 a Dyck path as follows: St001239The largest vector space dimension of the double dual of a simple module in the corresponding Nakayama algebra. St001299The product of all non-zero projective dimensions of simple modules of the corresponding Nakayama algebra. St001302The number of minimally dominating sets of vertices of a graph. St001304The number of maximally independent sets of vertices of a graph. St001315The dissociation number of a graph. St001316The domatic number of a graph. St001318The number of vertices of the largest induced subforest with the same number of connected components of a graph. St001321The number of vertices of the largest induced subforest of a graph. St001330The hat guessing number of a graph. St001337The upper domination number of a graph. St001338The upper irredundance number of a graph. St001343The dimension of the reduced incidence algebra of a poset. St001359The number of permutations in the equivalence class of a permutation obtained by taking inverses of cycles. St001390The number of bumps occurring when Schensted-inserting the letter 1 of a permutation. St001471The magnitude of a Dyck path. St001484The number of singletons of an integer partition. St001486The number of corners of the ribbon associated with an integer composition. St001494The Alon-Tarsi number of a graph. St001530The depth of a Dyck path. St001580The acyclic chromatic number of a graph. St001581The achromatic number of a graph. St001661Half the permanent of the Identity matrix plus the permutation matrix associated to the permutation. St001670The connected partition number of a graph. St001674The number of vertices of the largest induced star graph in the graph. St001717The largest size of an interval in a poset. St001913The number of preimages of an integer partition in Bulgarian solitaire. St001963The tree-depth of a graph. St001028Number of simple modules with injective dimension equal to the dominant dimension in the Nakayama algebra corresponding to the Dyck path. St001166Number of indecomposable projective non-injective modules with dominant dimension equal to the global dimension plus the number of indecomposable projective injective modules in the corresponding Nakayama algebra. St001505The number of elements generated by the Dyck path as a map in the full transformation monoid. St000570The Edelman-Greene number of a permutation. St001174The Gorenstein dimension of the algebra A/I when I is the tilting module corresponding to the permutation in the Auslander algebra of K[x]/(x^n). St001859The number of factors of the Stanley symmetric function associated with a permutation. St000516The number of stretching pairs of a permutation. St000623The number of occurrences of the pattern 52341 in a permutation. St000750The number of occurrences of the pattern 4213 in a permutation. St000751The number of occurrences of either of the pattern 2143 or 2143 in a permutation. St000802The number of occurrences of the vincular pattern |321 in a permutation. St000989The number of final rises of a permutation. St001552The number of inversions between excedances and fixed points of a permutation. St000254The nesting number of a set partition. St000289The decimal representation of a binary word. St000291The number of descents of a binary word. St000292The number of ascents of a binary word. St000354The number of recoils of a permutation. St000389The number of runs of ones of odd length in a binary word. St000390The number of runs of ones in a binary word. St000392The length of the longest run of ones in a binary word. St000472The sum of the ascent bottoms of a permutation. St000487The length of the shortest cycle of a permutation. St000566The number of ways to select a row of a Ferrers shape and two cells in this row. St000621The number of standard tableaux of shape equal to the given partition such that the minimal cyclic descent is even. St000627The exponent of a binary word. St000628The balance of a binary word. St000646The number of big ascents of a permutation. St000654The first descent of a permutation. St000691The number of changes of a binary word. St000710The number of big deficiencies of a permutation. St000711The number of big exceedences of a permutation. St000753The Grundy value for the game of Kayles on a binary word. St000847The number of standard Young tableaux whose descent set is the binary word. St000875The semilength of the longest Dyck word in the Catalan factorisation of a binary word. St000882The number of connected components of short braid edges in the graph of braid moves of a permutation. St000919The number of maximal left branches of a binary tree. St000940The number of characters of the symmetric group whose value on the partition is zero. St000990The first ascent of a permutation. St000993The multiplicity of the largest part of an integer partition. St001124The multiplicity of the standard representation in the Kronecker square corresponding to a partition. St001162The minimum jump of a permutation. St001208The number of connected components of the quiver of A/T when T is the 1-tilting module corresponding to the permutation in the Auslander algebra A of K[x]/(x^n). St001267The length of the Lyndon factorization of the binary word. St001313The number of Dyck paths above the lattice path given by a binary word. St001344The neighbouring number of a permutation. St001372The length of a longest cyclic run of ones of a binary word. St001419The length of the longest palindromic factor beginning with a one of a binary word. St001420Half the length of a longest factor which is its own reverse-complement of a binary word. St001421Half the length of a longest factor which is its own reverse-complement and begins with a one of a binary word. St001437The flex of a binary word. St001568The smallest positive integer that does not appear twice in the partition. St001722The number of minimal chains with small intervals between a binary word and the top element. St001884The number of borders of a binary word. St000119The number of occurrences of the pattern 321 in a permutation. St000219The number of occurrences of the pattern 231 in a permutation. St000279The size of the preimage of the map 'cycle-as-one-line notation' from Permutations to Permutations. St000281The size of the preimage of the map 'to poset' from Binary trees to Posets. St000282The size of the preimage of the map 'to poset' from Ordered trees to Posets. St000290The major index of a binary word. St000293The number of inversions of a binary word. St000295The length of the border of a binary word. St000296The length of the symmetric border of a binary word. St000297The number of leading ones in a binary word. St000347The inversion sum of a binary word. St000348The non-inversion sum of a binary word. St000360The number of occurrences of the pattern 32-1. St000367The number of simsun double descents of a permutation. St000375The number of non weak exceedences of a permutation that are mid-points of a decreasing subsequence of length 3. St000406The number of occurrences of the pattern 3241 in a permutation. St000407The number of occurrences of the pattern 2143 in a permutation. St000477The weight of a partition according to Alladi. St000478Another weight of a partition according to Alladi. St000485The length of the longest cycle of a permutation. St000486The number of cycles of length at least 3 of a permutation. St000510The number of invariant oriented cycles when acting with a permutation of given cycle type. St000541The number of indices greater than or equal to 2 of a permutation such that all smaller indices appear to its right. St000622The number of occurrences of the patterns 2143 or 4231 in a permutation. St000629The defect of a binary word. St000630The length of the shortest palindromic decomposition of a binary word. St000668The least common multiple of the parts of the partition. St000682The Grundy value of Welter's game on a binary word. St000707The product of the factorials of the parts. St000708The product of the parts of an integer partition. St000713The dimension of the irreducible representation of Sp(4) labelled by an integer partition. St000714The number of semistandard Young tableau of given shape, with entries at most 2. St000732The number of double deficiencies of a permutation. St000779The tier of a permutation. St000791The number of pairs of left tunnels, one strictly containing the other, of a Dyck path. St000799The number of occurrences of the vincular pattern |213 in a permutation. St000800The number of occurrences of the vincular pattern |231 in a permutation. St000801The number of occurrences of the vincular pattern |312 in a permutation. St000804The number of occurrences of the vincular pattern |123 in a permutation. St000842The breadth of a permutation. St000879The number of long braid edges in the graph of braid moves of a permutation. St000921The number of internal inversions of a binary word. St000929The constant term of the character polynomial of an integer partition. St000933The number of multipartitions of sizes given by an integer partition. St000962The 3-shifted major index of a permutation. St000983The length of the longest alternating subword. St001059Number of occurrences of the patterns 41352,42351,51342,52341 in a permutation. St001082The number of boxed occurrences of 123 in a permutation. St001128The exponens consonantiae of a partition. St001130The number of two successive successions in a permutation. St001139The number of occurrences of hills of size 2 in a Dyck path. St001381The fertility of a permutation. St001436The index of a given binary word in the lex-order among all its cyclic shifts. St001485The modular major index of a binary word. St001513The number of nested exceedences of a permutation. St001550The number of inversions between exceedances where the greater exceedance is linked. St001715The number of non-records in a permutation. St001728The number of invisible descents of a permutation. St001730The number of times the path corresponding to a binary word crosses the base line. St001847The number of occurrences of the pattern 1432 in a permutation. St000264The girth of a graph, which is not a tree. St000056The decomposition (or block) number of a permutation. St000061The number of nodes on the left branch of a binary tree. St000083The number of left oriented leafs of a binary tree except the first one. St000243The number of cyclic valleys and cyclic peaks of a permutation. St000251The number of nonsingleton blocks of a set partition. St000253The crossing number of a set partition. St000326The position of the first one in a binary word after appending a 1 at the end. St000383The last part of an integer composition. St000391The sum of the positions of the ones in a binary word. St000456The monochromatic index of a connected graph. St000461The rix statistic of a permutation. St000501The size of the first part in the decomposition of a permutation. St000504The cardinality of the first block of a set partition. St000529The number of permutations whose descent word is the given binary word. St000543The size of the conjugacy class of a binary word. St000626The minimal period of a binary word. St000640The rank of the largest boolean interval in a poset. St000657The smallest part of an integer composition. St000659The number of rises of length at least 2 of a Dyck path. St000678The number of up steps after the last double rise of a Dyck path. St000694The number of affine bounded permutations that project to a given permutation. St000695The number of blocks in the first part of the atomic decomposition of a set partition. St000706The product of the factorials of the multiplicities of an integer partition. St000717The number of ordinal summands of a poset. St000729The minimal arc length of a set partition. St000730The maximal arc length of a set partition. St000781The number of proper colouring schemes of a Ferrers diagram. St000792The Grundy value for the game of ruler on a binary word. St000805The number of peaks of the associated bargraph. St000823The number of unsplittable factors of the set partition. St000832The number of permutations obtained by reversing blocks of three consecutive numbers. St000914The sum of the values of the Möbius function of a poset. St001035The convexity degree of the parallelogram polyomino associated with the Dyck path. St001075The minimal size of a block of a set partition. St001101The coefficient times the product of the factorials of the parts of the monomial symmetric function indexed by the partition in the formal group law for increasing trees. St001199The dominant dimension of eAe for the corresponding Nakayama algebra A with minimal faithful projective-injective module eA. St001204Call a CNakayama algebra (a Nakayama algebra with a cyclic quiver) with Kupisch series L=[c_0,c_1,...,c_{n−1}] such that n=c_0 < c_i for all i > 0 a special CNakayama algebra. St001236The dominant dimension of the corresponding Comp-Nakayama algebra. St001256Number of simple reflexive modules that are 2-stable reflexive. St001260The permanent of an alternating sign matrix. St001355Number of non-empty prefixes of a binary word that contain equally many 0's and 1's. St001415The length of the longest palindromic prefix of a binary word. St001418Half of the global dimension of the stable Auslander algebra of the Nakayama algebra corresponding to the Dyck path. St001468The smallest fixpoint of a permutation. St001496The number of graphs with the same Laplacian spectrum as the given graph. St001501The dominant dimension of magnitude 1 Nakayama algebras. St001592The maximal number of simple paths between any two different vertices of a graph. St001603The number of colourings of a polygon such that the multiplicities of a colour are given by a partition. St001605The number of colourings of a cycle such that the multiplicities of colours are given by a partition. St001721The degree of a binary word. St001838The number of nonempty primitive factors of a binary word. St001885The number of binary words with the same proper border set. St001890The maximum magnitude of the Möbius function of a poset. St001901The largest multiplicity of an irreducible representation contained in the higher Lie character for an integer partition. St001934The number of monotone factorisations of genus zero of a permutation of given cycle type. St000065The number of entries equal to -1 in an alternating sign matrix. St000126The number of occurrences of the contiguous pattern [.,[.,[.,[.,[.,.]]]]] in a binary tree. St000128The number of occurrences of the contiguous pattern [.,[.,[[.,[.,.]],.]]] in a binary tree. St000205Number of non-integral Gelfand-Tsetlin polytopes with prescribed top row and partition weight. St000206Number of non-integral Gelfand-Tsetlin polytopes with prescribed top row and integer composition weight. St000210Minimum over maximum difference of elements in cycles. St000221The number of strong fixed points of a permutation. St000234The number of global ascents of a permutation. St000317The cycle descent number of a permutation. St000353The number of inner valleys of a permutation. St000357The number of occurrences of the pattern 12-3. St000365The number of double ascents of a permutation. St000372The number of mid points of increasing subsequences of length 3 in a permutation. St000379The number of Hamiltonian cycles in a graph. St000434The number of occurrences of the pattern 213 or of the pattern 312 in a permutation. St000435The number of occurrences of the pattern 213 or of the pattern 231 in a permutation. St000437The number of occurrences of the pattern 312 or of the pattern 321 in a permutation. St000455The second largest eigenvalue of a graph if it is integral. St000462The major index minus the number of excedences of a permutation. St000491The number of inversions of a set partition. St000497The lcb statistic of a set partition. St000555The number of occurrences of the pattern {{1,3},{2}} in a set partition. St000559The number of occurrences of the pattern {{1,3},{2,4}} in a set partition. St000560The number of occurrences of the pattern {{1,2},{3,4}} in a set partition. St000561The number of occurrences of the pattern {{1,2,3}} in a set partition. St000562The number of internal points of a set partition. St000563The number of overlapping pairs of blocks of a set partition. St000565The major index of a set partition. St000572The dimension exponent of a set partition. St000581The number of occurrences of the pattern {{1,3},{2}} such that 1 is minimal, 2 is maximal. St000582The number of occurrences of the pattern {{1,3},{2}} such that 1 is minimal, 3 is maximal, (1,3) are consecutive in a block. St000585The number of occurrences of the pattern {{1,3},{2}} such that 2 is maximal, (1,3) are consecutive in a block. St000590The number of occurrences of the pattern {{1},{2,3}} such that 2 is minimal, 1 is maximal, (2,3) are consecutive in a block. St000594The number of occurrences of the pattern {{1,3},{2}} such that 1,2 are minimal, (1,3) are consecutive in a block. St000600The number of occurrences of the pattern {{1,3},{2}} such that 1 is minimal, (1,3) are consecutive in a block. St000602The number of occurrences of the pattern {{1,3},{2}} such that 1 is minimal. St000610The number of occurrences of the pattern {{1,3},{2}} such that 2 is maximal. St000613The number of occurrences of the pattern {{1,3},{2}} such that 2 is minimal, 3 is maximal, (1,3) are consecutive in a block. St000624The normalized sum of the minimal distances to a greater element. St000649The number of 3-excedences of a permutation. St000658The number of rises of length 2 of a Dyck path. St000664The number of right ropes of a permutation. St000666The number of right tethers of a permutation. St000674The number of hills of a Dyck path. St000699The toughness times the least common multiple of 1,. St000702The number of weak deficiencies of a permutation. St000709The number of occurrences of 14-2-3 or 14-3-2. St000726The normalized sum of the leaf labels of the increasing binary tree associated to a permutation. St000748The major index of the permutation obtained by flattening the set partition. St000768The number of peaks in an integer composition. St000803The number of occurrences of the vincular pattern |132 in a permutation. St000807The sum of the heights of the valleys of the associated bargraph. St000818The sum of the entries in the column specified by the composition of the change of basis matrix from quasisymmetric Schur functions to monomial quasisymmetric functions. St000866The number of admissible inversions of a permutation in the sense of Shareshian-Wachs. St000873The aix statistic of a permutation. St000877The depth of the binary word interpreted as a path. St000980The number of boxes weakly below the path and above the diagonal that lie below at least two peaks. St000982The length of the longest constant subword. St001005The number of indices for a permutation that are either left-to-right maxima or right-to-left minima but not both. St001061The number of indices that are both descents and recoils of a permutation. St001062The maximal size of a block of a set partition. St001107The number of times one can erase the first up and the last down step in a Dyck path and still remain a Dyck path. St001141The number of occurrences of hills of size 3 in a Dyck path. St001198The number of simple modules in the algebra eAe with projective dimension at most 1 in the corresponding Nakayama algebra A with minimal faithful projective-injective module eA. St001206The maximal dimension of an indecomposable projective eAe-module (that is the height of the corresponding Dyck path) of the corresponding Nakayama algebra with minimal faithful projective-injective module eA. St001281The normalized isoperimetric number of a graph. St001325The minimal number of occurrences of the comparability-pattern in a linear ordering of the vertices of the graph. St001365The number of lattice paths of the same length weakly above the path given by a binary word. St001371The length of the longest Yamanouchi prefix of a binary word. St001413Half the length of the longest even length palindromic prefix of a binary word. St001414Half the length of the longest odd length palindromic prefix of a binary word. St001423The number of distinct cubes in a binary word. St001429The number of negative entries in a signed permutation. St001434The number of negative sum pairs of a signed permutation. St001551The number of restricted non-inversions between exceedances where the rightmost exceedance is linked. St001570The minimal number of edges to add to make a graph Hamiltonian. St001604The multiplicity of the irreducible representation corresponding to a partition in the relabelling action on polygons. St001640The number of ascent tops in the permutation such that all smaller elements appear before. St001682The number of distinct positions of the pattern letter 1 in occurrences of 123 in a permutation. St001704The size of the largest multi-subset-intersection of the deck of a graph with the deck of another graph. St001793The difference between the clique number and the chromatic number of a graph. St000806The semiperimeter of the associated bargraph. St001195The global dimension of the algebra A/AfA of the corresponding Nakayama algebra A with minimal left faithful projective-injective module Af. St001175The size of a partition minus the hook length of the base cell. St001878The projective dimension of the simple modules corresponding to the minimum of L in the incidence algebra of the lattice L. St001498The normalised height of a Nakayama algebra with magnitude 1. St001632The number of indecomposable injective modules I with dim Ext^1(I,A)=1 for the incidence algebra A of a poset. St001771The number of occurrences of the signed pattern 1-2 in a signed permutation. St001870The number of positive entries followed by a negative entry in a signed permutation. St001895The oddness of a signed permutation. St001907The number of Bastidas - Hohlweg - Saliola excedances of a signed permutation. St001738The minimal order of a graph which is not an induced subgraph of the given graph. St001553The number of indecomposable summands of the square of the Jacobson radical as a bimodule in the Nakayama algebra corresponding to the Dyck path. St001491The number of indecomposable projective-injective modules in the algebra corresponding to a subset. St001431Half of the Loewy length minus one of a modified stable Auslander algebra of the Nakayama algebra corresponding to the Dyck path. St001948The number of augmented double ascents of a permutation. St001200The number of simple modules in eAe with projective dimension at most 2 in the corresponding Nakayama algebra A with minimal faithful projective-injective module eA. St001520The number of strict 3-descents. St001555The order of a signed permutation. St001556The number of inversions of the third entry of a permutation. St001557The number of inversions of the second entry of a permutation. St001811The Castelnuovo-Mumford regularity of a permutation. St001960The number of descents of a permutation minus one if its first entry is not one. St001630The global dimension of the incidence algebra of the lattice over the rational numbers. St001876The number of 2-regular simple modules in the incidence algebra of the lattice. St001864The number of excedances of a signed permutation. St001896The number of right descents of a signed permutations.