Expansion of 1/Product_{m>=1} (1 - m*q^m)^18.

Terms

a(0) =1a(1) =18a(2) =207a(3) =1842a(4) =13869a(5) =92250a(6) =557214a(7) =3111624a(8) =16272972a(9) =80461694a(10) =378917667a(11) =1709416008a(12) =7422200694a(13) =31136646366a(14) =126608628735a(15) =500368588830