G.f. A(x) satisfies: A(x) = (1/(1 + x)) * A(x^2)*A(x^3)*A(x^4)* ... *A(x^k)* ...

Terms

a(0) =1a(1) =-1a(2) =0a(3) =-1a(4) =0a(5) =0a(6) =-1a(7) =2a(8) =-1a(9) =2a(10) =0a(11) =3a(12) =-4a(13) =5a(14) =-1a(15) =1a(16) =-3a(17) =0a(18) =-1a(19) =-4a(20) =-1a(21) =-2a(22) =3a(23) =-12a(24) =6a(25) =-14a(26) =15a(27) =-8a(28) =17a(29) =-16