G.f. A(x) satisfies: A(x) = A(x^3 - x^5)/x^2.

Terms

a(0) =1a(1) =-1a(2) =0a(3) =-1a(4) =3a(5) =-3a(6) =1a(7) =0a(8) =0a(9) =-1a(10) =7a(11) =-21a(12) =38a(13) =-62a(14) =129a(15) =-262a(16) =412a(17) =-543a(18) =748a(19) =-1111a(20) =1491a(21) =-1675a(22) =1705a(23) =-1782a(24) =1881a(25) =-1749a(26) =1290a(27) =-716a(28) =305a(29) =-249