a(n) = n^(n+1) mod (n+1)^n.

Terms

a(0) =0a(1) =1a(2) =8a(3) =17a(4) =399a(5) =73a(6) =44638a(7) =1570497a(8) =5077565a(9) =486784401a(10) =22187726197a(11) =166394893969