a(n) = (n+5)! / 5.

A129923

a(n) = (n+5)! / 5.

Terms

    a(0) =24a(1) =144a(2) =1008a(3) =8064a(4) =72576a(5) =725760a(6) =7983360a(7) =95800320a(8) =1245404160a(9) =17435658240a(10) =261534873600

External references