Expansion of Product_{k>=1} (1 + x^(4*k))^(4*k) / (1 + x^k)^k.

Terms

a(0) =1a(1) =-1a(2) =-1a(3) =-2a(4) =5a(5) =-4a(6) =0a(7) =-6a(8) =26a(9) =-16a(10) =6a(11) =-31a(12) =93a(13) =-81a(14) =19a(15) =-147a(16) =310a(17) =-295a(18) =136a(19) =-486a(20) =1069a(21) =-940a(22) =645a(23) =-1575a(24) =3338a(25) =-3021a(26) =2301a(27) =-5089a(28) =9735a(29) =-9381