Expansion of Product_{k>=1} (1 - x^k)^(sigma_3(k)).

Terms

a(0) =1a(1) =-1a(2) =-9a(3) =-19a(4) =-9a(5) =163a(6) =573a(7) =1127a(8) =109a(9) =-7198a(10) =-27159a(11) =-58611a(12) =-50378a(13) =157532a(14) =892986a(15) =2431694a(16) =4040909a(17) =1605559a(18) =-16109148a(19) =-68261139a(20) =-167737209a(21) =-263590908a(22) =-109589779a(23) =934422499a(24) =3976197701a(25) =9922490735a(26) =16765911071a(27) =13022553978a(28) =-33008232762