a(n) = Sum_{d|n} d^n * binomial(d+n/d-2, d-1).
A338661
a(n) = Sum_{d|n} d^n * binomial(d+n/d-2, d-1).
Terms
- a(0) =1a(1) =5a(2) =28a(3) =289a(4) =3126a(5) =49036a(6) =823544a(7) =17040385a(8) =387538588a(9) =10048833246a(10) =285311670612
External references
- oeis: A338661