Number of permutations of [2n] with longest increasing subsequence of length n.

A267433

Number of permutations of [2n] with longest increasing subsequence of length n.

Terms

    a(0) =1a(1) =1a(2) =13a(3) =381a(4) =17557a(5) =1100902a(6) =87116283a(7) =8312317976a(8) =927716186325

External references