G.f.: Sum_{n>=0} x^n * (1-x)^A003188(n), where A003188(n) = n XOR [n/2] is the Gray code for n.

Terms

a(0) =1a(1) =1a(2) =0a(3) =-2a(4) =2a(5) =-5a(6) =9a(7) =-3a(8) =-13a(9) =14a(10) =35a(11) =-149a(12) =300a(13) =-450a(14) =673a(15) =-1151a(16) =1856a(17) =-2366a(18) =2424a(19) =-3192a(20) =9319a(21) =-32687a(22) =96858a(23) =-238410a(24) =508290a(25) =-998065a(26) =1925065a(27) =-3750685a(28) =7162328a(29) =-12635545