Expansion of Product_{k>=1} ((1 + x^k) / (1 + x^(4*k)))^k.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =7a(5) =15a(6) =26a(7) =44a(8) =74a(9) =125a(10) =205a(11) =331a(12) =534a(13) =844a(14) =1332a(15) =2077a(16) =3215a(17) =4934a(18) =7533a(19) =11410a(20) =17191a(21) =25751a(22) =38346a(23) =56833a(24) =83814a(25) =123025a(26) =179776a(27) =261639a(28) =379186a(29) =547476