a(n) = n^8 * Sum_{d^2|n} 1 / d^8.

Terms

a(0) =1a(1) =256a(2) =6561a(3) =65792a(4) =390625a(5) =1679616a(6) =5764801a(7) =16842752a(8) =43053282a(9) =100000000a(10) =214358881a(11) =431661312a(12) =815730721a(13) =1475789056a(14) =2562890625a(15) =4311810048a(16) =6975757441a(17) =11021640192a(18) =16983563041a(19) =25700000000a(20) =37822859361a(21) =54875873536a(22) =78310985281a(23) =110505295872a(24) =152588281250