Expansion of Sum_{k>0} x^k / (1 - 2*x^(2*k)).

Terms

a(0) =1a(1) =1a(2) =3a(3) =1a(4) =5a(5) =3a(6) =9a(7) =1a(8) =19a(9) =5a(10) =33a(11) =3a(12) =65a(13) =9a(14) =135a(15) =1a(16) =257a(17) =19a(18) =513a(19) =5a(20) =1035a(21) =33a(22) =2049a(23) =3a(24) =4101a(25) =65a(26) =8211a(27) =9a(28) =16385a(29) =135