Dirichlet g.f.: 1 / zeta(s-4).

Terms

a(0) =1a(1) =-16a(2) =-81a(3) =0a(4) =-625a(5) =1296a(6) =-2401a(7) =0a(8) =0a(9) =10000a(10) =-14641a(11) =0a(12) =-28561a(13) =38416a(14) =50625a(15) =0a(16) =-83521a(17) =0a(18) =-130321a(19) =0a(20) =194481a(21) =234256a(22) =-279841a(23) =0a(24) =0a(25) =456976a(26) =0a(27) =0a(28) =-707281a(29) =-810000