a(n) = n^1*(n+1)^2*(n+2)^3*(n+3)^4*(n+4)^5/(1!*2!*3!*4!*5!).

A120408

a(n) = n^1*(n+1)^2*(n+2)^3*(n+3)^4*(n+4)^5/(1!*2!*3!*4!*5!).

Terms

    a(0) =2500a(1) =162000a(2) =3781575a(3) =49172480a(4) =432081216a(5) =2857680000a(6) =15219319500a(7) =68309049600a(8) =266863130820a(9) =929327871472

External references