Expansion of Product(1+q^m)^(m(m-1)/2); m=1..inf.

Terms

a(0) =1a(1) =0a(2) =1a(3) =3a(4) =6a(5) =13a(6) =24a(7) =49a(8) =91a(9) =181a(10) =334a(11) =632a(12) =1163a(13) =2138a(14) =3880a(15) =7006a(16) =12531a(17) =22279a(18) =39369a(19) =69078a(20) =120597a(21) =209282a(22) =361405a(23) =620829a(24) =1061687a(25) =1807014a(26) =3062642a(27) =5168784a(28) =8688820a(29) =14549659