a(n) = prime(n)^8.

Terms

a(0) =256a(1) =6561a(2) =390625a(3) =5764801a(4) =214358881a(5) =815730721a(6) =6975757441a(7) =16983563041a(8) =78310985281a(9) =500246412961a(10) =852891037441