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

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =7a(5) =12a(6) =22a(7) =36a(8) =62a(9) =104a(10) =174a(11) =286a(12) =478a(13) =780a(14) =1284a(15) =2100a(16) =3433a(17) =5586a(18) =9114a(19) =14798a(20) =24064a(21) =39050a(22) =63376a(23) =102726a(24) =166584a(25) =269835a(26) =437190a(27) =707964a(28) =1146480a(29) =1855966