G.f. A(x) satisfies: A(x) = A(x^4 - x^6)/x^3.

Terms

a(0) =1a(1) =-1a(2) =0a(3) =0a(4) =-1a(5) =3a(6) =-3a(7) =1a(8) =0a(9) =0a(10) =0a(11) =0a(12) =0a(13) =0a(14) =0a(15) =0a(16) =-1a(17) =9a(18) =-36a(19) =84a(20) =-123a(21) =93a(22) =81a(23) =-459a(24) =978a(25) =-1346a(26) =1152a(27) =-132a(28) =-1649a(29) =3681