A216119
Sequences linked to this entry ?
-
A216118: Triangle read by rows: T(n,k) is the number of stretching pairs in all permutations in S_{n,k} (=set of permutations in S_n with k cycles) (n >= 3; 1 …
match row sums
1, 1 · 10, 15, 5 · 90, 165, 90, 15 … Σ 0, 2, 30, 360, 4200, 50400, 635040, …