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

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =11a(6) =29a(7) =81a(8) =229a(9) =696a(10) =2181a(11) =7045a(12) =23653a(13) =81433a(14) =288173a(15) =1046814a(16) =3887749a(17) =14768783a(18) =57275541a(19) =226462801a(20) =912443397a(21) =3741515804a(22) =15603500797a(23) =66134448329a(24) =284660214181