Dirichlet g.f.: 1 / zeta(s)^9.

Terms

a(0) =1a(1) =-9a(2) =-9a(3) =36a(4) =-9a(5) =81a(6) =-9a(7) =-84a(8) =36a(9) =81a(10) =-9a(11) =-324a(12) =-9a(13) =81a(14) =81a(15) =126a(16) =-9a(17) =-324a(18) =-9a(19) =-324a(20) =81a(21) =81a(22) =-9a(23) =756a(24) =36a(25) =81a(26) =-84a(27) =-324a(28) =-9a(29) =-729