G.f.: 1 / (1 + Sum_{k>=0} x^(2^k)).

Terms

a(0) =1a(1) =-1a(2) =0a(3) =1a(4) =-2a(5) =2a(6) =0a(7) =-3a(8) =4a(9) =-2a(10) =-2a(11) =6a(12) =-6a(13) =0a(14) =8a(15) =-11a(16) =4a(17) =10a(18) =-20a(19) =14a(20) =10a(21) =-36a(22) =38a(23) =-2a(24) =-54a(25) =84a(26) =-46a(27) =-56a(28) =152a(29) =-144