Expansion of Product_{m>=1} (1-m*q^m)^27.

Terms

a(0) =1a(1) =-27a(2) =297a(3) =-1548a(4) =2079a(5) =18036a(6) =-88893a(7) =42471a(8) =632259a(9) =-1042392a(10) =-2491695a(11) =3171771a(12) =19897479a(13) =-6178491a(14) =-149788494a(15) =40753548a(16) =598051971a(17) =397032246a(18) =-1758684468a(19) =-5331986973a(20) =4009289778a(21) =22014953235