G.f. satisfies: A(x) = A(x^2 - x^3)/(1-x).

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =-1a(6) =2a(7) =-1a(8) =5a(9) =-8a(10) =9a(11) =2a(12) =-3a(13) =-5a(14) =19a(15) =-13a(16) =1a(17) =-16a(18) =83a(19) =-104a(20) =-40a(21) =263a(22) =-198a(23) =-332a(24) =998a(25) =-1276a(26) =999a(27) =-272a(28) =-799a(29) =1991