Column 0 of triangle A126445; a(n) = binomial( binomial(n+2,3), n).

A126446

Column 0 of triangle A126445; a(n) = binomial( binomial(n+2,3), n).

Terms

    a(0) =1a(1) =1a(2) =6a(3) =120a(4) =4845a(5) =324632a(6) =32468436a(7) =4529365776a(8) =840261910995

External references