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

Terms

a(0) =1a(1) =2a(2) =5a(3) =12a(4) =26a(5) =54a(6) =110a(7) =214a(8) =409a(9) =764a(10) =1400a(11) =2520a(12) =4475a(13) =7828a(14) =13532a(15) =23124a(16) =39102a(17) =65472a(18) =108658a(19) =178786a(20) =291883a(21) =472984a(22) =761119a(23) =1216696a(24) =1932898a(25) =3052462a(26) =4793464a(27) =7487122a(28) =11634771a(29) =17991760