Expansion of Product_{k>=1} 1 / (1 - x^(3*k-1))^2.

Terms

a(0) =1a(1) =0a(2) =2a(3) =0a(4) =3a(5) =2a(6) =4a(7) =4a(8) =7a(9) =6a(10) =13a(11) =10a(12) =19a(13) =18a(14) =27a(15) =30a(16) =42a(17) =44a(18) =63a(19) =66a(20) =91a(21) =100a(22) =130a(23) =144a(24) =187a(25) =206a(26) =263a(27) =294a(28) =364a(29) =412