Column 2 of triangle A126445; a(n) = C( C(n+4,3) - 4, n).

A126448

Column 2 of triangle A126445; a(n) = C( C(n+4,3) - 4, n).

Terms

    a(0) =1a(1) =6a(2) =120a(3) =4495a(4) =270725a(5) =24040016a(6) =2967205528a(7) =487444845680

External references