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

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =5a(5) =10a(6) =16a(7) =26a(8) =44a(9) =68a(10) =110a(11) =167a(12) =265a(13) =399a(14) =609a(15) =919a(16) =1371a(17) =2040a(18) =3005a(19) =4420a(20) =6436a(21) =9364a(22) =13501a(23) =19433a(24) =27806a(25) =39639a(26) =56265a(27) =79572a(28) =112126a(29) =157390