Expansion of 1/(2 - Product_{k>=1} (1 + x^(2*k-1))).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =7a(6) =12a(7) =21a(8) =38a(9) =68a(10) =120a(11) =212a(12) =377a(13) =670a(14) =1188a(15) =2107a(16) =3740a(17) =6638a(18) =11778a(19) =20898a(20) =37084a(21) =65808a(22) =116775a(23) =207212a(24) =367696a(25) =652478a(26) =1157815a(27) =2054524a(28) =3645730a(29) =6469316