Expansion of Product_{m>=1} (1 - m*q^m)^2.

Terms

a(0) =1a(1) =-2a(2) =-3a(3) =2a(4) =4a(5) =16a(6) =-3a(7) =6a(8) =-31a(9) =-72a(10) =-15a(11) =-44a(12) =9a(13) =154a(14) =521a(15) =48a(16) =426a(17) =66a(18) =2a(19) =-1618a(20) =-3782a(21) =-210a(22) =-3882a(23) =-1282a(24) =1119a(25) =3940a(26) =10867a(27) =37208a(28) =11647a(29) =20574