Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(k^8).

Terms

a(0) =1a(1) =256a(2) =6561a(3) =98432a(4) =390625a(5) =3359232a(6) =5764801a(7) =36383488a(8) =64573362a(9) =200000000a(10) =214358881a(11) =1505775744a(12) =815730721a(13) =2951578112a(14) =5125781250a(15) =13076504640a(16) =6975757441a(17) =38570701824a(18) =16983563041a(19) =89650000000a(20) =75645718722a(21) =109751747072a(22) =78310985281a(23) =624190655232a(24) =228882031250