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

Terms

a(0) =1a(1) =-4a(2) =-9a(3) =0a(4) =-25a(5) =36a(6) =-49a(7) =0a(8) =0a(9) =100a(10) =-121a(11) =0a(12) =-169a(13) =196a(14) =225a(15) =0a(16) =-289a(17) =0a(18) =-361a(19) =0a(20) =441a(21) =484a(22) =-529a(23) =0a(24) =0a(25) =676a(26) =0a(27) =0a(28) =-841a(29) =-900