Number of permutations of [2n+2] in which the longest increasing run has length n+2.

A230342

Number of permutations of [2n+2] in which the longest increasing run has length n+2.

Terms

    a(0) =1a(1) =6a(2) =67a(3) =1024a(4) =19710a(5) =456720a(6) =12372360a(7) =383685120a(8) =13406178240a(9) =521194867200

External references