Numerator of (n+1)^n/n!.

Terms

a(0) =1a(1) =2a(2) =9a(3) =32a(4) =625a(5) =324a(6) =117649a(7) =131072a(8) =4782969a(9) =1562500a(10) =25937424601a(11) =35831808a(13) =110730297608