Dirichlet g.f.: 1 / (zeta(s) * zeta(s-1) * zeta(s-2)).

Terms

a(0) =1a(1) =-7a(2) =-13a(3) =14a(4) =-31a(5) =91a(6) =-57a(7) =-8a(8) =39a(9) =217a(10) =-133a(11) =-182a(12) =-183a(13) =399a(14) =403a(15) =0a(16) =-307a(17) =-273a(18) =-381a(19) =-434a(20) =741a(21) =931a(22) =-553a(23) =104a(24) =155a(25) =1281a(26) =-27a(27) =-798a(28) =-871a(29) =-2821