Expansion of Product_{m>=1} (1 + m*q^m)^19.

Terms

a(0) =1a(1) =19a(2) =209a(3) =1748a(4) =12217a(5) =74898a(6) =414865a(7) =2116885a(8) =10087480a(9) =45348041a(10) =193814402a(11) =792340831a(12) =3113639744a(13) =11808753973a(14) =43368768307a(15) =154674601937a(16) =537009888061