G.f. satisfies: A(x) = (1 + x) * Product_{k>0} A(x^(2*k)) / Product_{k>1} A(x^(2*k-1)).

Terms

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