2744280

Appears in sequences

• 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 <= k <= n-2).at n=29A216118
• Numbers k for which sigma(k)/k - 2/9 is an integer.at n=1A218430