66275

Appears in sequences

• Number of permutations of {1,2,...,n} having excedance set {1,2,...,k} for some k=0...n-1 (for k=0 we have the empty set). The excedance set of a permutation p in S_n is the set of indices i such that p(i)>i.at n=9A136127
• Irregular triangle read by rows: T(n,k) is the number of permutations in C_n (= the 1-cycles in S_n) having k stretching pairs.at n=43A216121
• Growth series for affine Coxeter group (or affine Weyl group) D_11.at n=8A266766
• Growth series for affine Coxeter group B_11.at n=8A267174