A027999 Expansion of Product(1+q^m)^(m(m-1)/2); m=1..inf.

1, 0, 1, 3, 6, 13, 24, 49, 91, 181, 334, 632, 1163, 2138, 3880, 7006, 12531, 22279, 39369, 69078, 120597, 209282, 361405, 620829, 1061687, 1807014, 3062642, 5168784, 8688820, 14549659, 24274226, 40353748