268521

Appears in sequences

• Numbers of pattern-matching permutations of (1234) for the permutations of {1, 2, ..., n} on n = 4, 5, 6, ... elements.at n=5A158005
• Number of permutations T(n,k) in S_n containing an increasing subsequence of length k; triangle T(n,k), n>=1, 1<=k<=n, read by rows.at n=39A214152
• Number of positive subset-sum trees of weight n.at n=7A301934