G.f. A(x) satisfies: A(x) = A(x^3 - x^6)/x^2.

Terms

a(0) =1a(1) =-1a(2) =0a(3) =-1a(4) =4a(5) =-6a(6) =4a(7) =-1a(8) =0a(9) =-1a(10) =10a(11) =-45a(12) =124a(13) =-262a(14) =564a(15) =-1360a(16) =3076a(17) =-5913a(18) =10238a(19) =-17861a(20) =32040a(21) =-54785a(22) =85310a(23) =-124275a(24) =178760a(25) =-256919a(26) =354870a(27) =-455046a(28) =543444a(29) =-623196