a(n) = (Product_{i=1..5} n^i+i)/5!.

A131675

a(n) = (Product_{i=1..5} n^i+i)/5!.

Terms

    a(0) =1a(1) =6a(2) =1221a(3) =231880a(4) =13443885a(5) =340203456a(6) =4910472385a(7) =47565216504a(8) =342540938025

External references