Expansion of Product_{m>=1} (1-m*q^m)^31.

Terms

a(0) =1a(1) =-31a(2) =403a(3) =-2666a(4) =7254a(5) =17329a(6) =-187488a(7) =384865a(8) =916050a(9) =-4785594a(10) =267220a(11) =23607058a(12) =8499735a(13) =-138349218a(14) =-198872750a(15) =1055690151a(16) =1063384258a(17) =-4561862102a(18) =-6887455628a(19) =9053067640a(20) =53042071422