Number of sequences in {1,...,n}^n with longest increasing subsequence of length three.

A268870

Number of sequences in {1,...,n}^n with longest increasing subsequence of length three.

Terms

    a(0) =1a(1) =45a(2) =1131a(3) =23611a(4) =461154a(5) =8837823a(6) =169844455a(7) =3307239364a(8) =65559881608

External references