A022713 Expansion of Product (1+m*q^m)^-21; m=1..inf.

1, -21, 189, -952, 3087, -8400, 27503, -92907, 246981, -588490, 1649823, -4645179, 10989769, -25476717, 65615424, -161705810, 363998754, -834169539, 1973130271, -4510112565, 9969930495, -22054706773