Column 0 of triangle A126450; a(n) = C( C(n+2,3) + 1, n).

A126451

Column 0 of triangle A126450; a(n) = C( C(n+2,3) + 1, n).

Terms

    a(0) =1a(1) =2a(2) =10a(3) =165a(4) =5985a(5) =376992a(6) =36288252a(7) =4935847320a(8) =899749479915

External references