Number of permutations of [2n+5] in which the longest increasing run has length n+5.

A230345

Number of permutations of [2n+5] in which the longest increasing run has length n+5.

Terms

    a(0) =1a(1) =12a(2) =181a(3) =3322a(4) =72540a(5) =1845480a(6) =53749920a(7) =1766525760a(8) =64739122560

External references