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

Terms

a(0) =1a(1) =-1a(2) =-3a(3) =-3a(4) =-4a(5) =3a(6) =2a(7) =19a(8) =21a(9) =32a(10) =40a(11) =45a(12) =16a(13) =8a(14) =-18a(15) =-125a(16) =-164a(17) =-291a(18) =-358a(19) =-530a(20) =-588a(21) =-724a(22) =-592a(23) =-675a(24) =-358a(25) =-207a(26) =570a(27) =1201a(28) =2208a(29) =3333