Expansion of Product_{m>=1} (1+q^m)^(-4).

Terms

a(0) =1a(1) =-4a(2) =6a(3) =-8a(4) =17a(5) =-28a(6) =38a(7) =-56a(8) =84a(9) =-124a(10) =172a(11) =-232a(12) =325a(13) =-448a(14) =594a(15) =-784a(16) =1049a(17) =-1388a(18) =1796a(19) =-2320a(20) =3005a(21) =-3864a(22) =4912a(23) =-6216a(24) =7877a(25) =-9940a(26) =12430a(27) =-15488a(28) =19309a(29) =-23972