Number of permutations of [2n+1] in which the longest increasing run has length n+1.

A230251

Number of permutations of [2n+1] in which the longest increasing run has length n+1.

Terms

    a(0) =1a(1) =4a(2) =41a(3) =602a(4) =11304a(5) =257400a(6) =6881160a(7) =211170960a(8) =7315701120a(9) =282398538240

External references