Number of permutations of [2n+4] in which the longest increasing run has length n+4.

A230344

Number of permutations of [2n+4] in which the longest increasing run has length n+4.

Terms

    a(0) =1a(1) =10a(2) =137a(3) =2360a(4) =49236a(5) =1209936a(6) =34288800a(7) =1102187520a(8) =39656131200

External references