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

Terms

a(0) =1a(1) =-1a(2) =-2a(3) =-1a(4) =4a(5) =0a(6) =-4a(7) =3a(8) =21a(9) =-4a(10) =-29a(11) =-7a(12) =51a(13) =-24a(14) =-105a(15) =-7a(16) =201a(17) =-30a(18) =-291a(19) =34a(20) =642a(21) =-42a(22) =-874a(23) =75a(24) =1764a(25) =-262a(26) =-2737a(27) =-40a(28) =4555a(29) =-818