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

Terms

a(0) =1a(1) =18a(2) =189a(3) =1518a(4) =10224a(5) =60552a(6) =324657a(7) =1606050a(8) =7429455a(9) =32458628a(10) =134950419a(11) =537136776a(12) =2056614597a(13) =7604901990a(14) =27248140107a(15) =94861629852a(16) =321652565253