Expansion of Product_{k>=1} ((1 + x^k) / (1 - x^(3*k)))^k.

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =9a(5) =18a(6) =36a(7) =60a(8) =105a(9) =191a(10) =314a(11) =528a(12) =896a(13) =1447a(14) =2355a(15) =3831a(16) =6071a(17) =9619a(18) =15207a(19) =23648a(20) =36693a(21) =56724a(22) =86762a(23) =132264a(24) =200853a(25) =302699a(26) =454565a(27) =680061a(28) =1011540a(29) =1499363