G.f. satisfies: A(x) = (1-x) * A(x^2)*A(x^3)*A(x^4)*...*A(x^n)*... .

Terms

a(0) =1a(1) =-1a(2) =-1a(3) =0a(4) =-1a(5) =2a(6) =-1a(7) =3a(8) =-1a(9) =1a(10) =4a(11) =-2a(12) =-4a(13) =-1a(14) =7a(15) =-11a(16) =0a(17) =-6a(18) =3a(19) =-6a(20) =9a(21) =2a(22) =-6a(23) =2a(24) =5a(25) =12a(26) =-16a(27) =48a(28) =4a(29) =-1