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

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =7a(5) =13a(6) =26a(7) =50a(8) =96a(9) =190a(10) =377a(11) =747a(12) =1494a(13) =3004a(14) =6051a(15) =12237a(16) =24843a(17) =50557a(18) =103143a(19) =210975a(20) =432461a(21) =888173a(22) =1827562a(23) =3766980a(24) =7776620a(25) =16077958a(26) =33286760a(27) =69002906a(28) =143213917a(29) =297573927