Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(k^9).

Terms

a(0) =1a(1) =512a(2) =19683a(3) =393472a(4) =1953125a(5) =20155392a(6) =40353607a(7) =290936320a(8) =581140575a(9) =2000000000a(10) =2357947691a(11) =18064270080a(12) =10604499373a(13) =41322093568a(14) =76886718750a(15) =209122656384a(16) =118587876497a(17) =694262555136a(18) =322687697779