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

Terms

a(0) =1a(1) =-5a(2) =-11a(3) =3a(4) =-29a(5) =55a(6) =-55a(7) =3a(8) =16a(9) =145a(10) =-131a(11) =-33a(12) =-181a(13) =275a(14) =319a(15) =3a(16) =-305a(17) =-80a(18) =-379a(19) =-87a(20) =605a(21) =655a(22) =-551a(23) =-33a(24) =96a(25) =905a(26) =16a(27) =-165a(28) =-869a(29) =-1595