Expansion of Sum_{k>=0} x^(k^2) / Product_{j=1..k} (1 + x^j)^j.

Terms

a(0) =1a(1) =1a(2) =-1a(3) =1a(4) =0a(5) =0a(6) =-2a(7) =2a(8) =1a(9) =0a(10) =-4a(11) =2a(12) =0a(13) =3a(14) =-3a(15) =5a(16) =-6a(17) =-1a(18) =-7a(19) =16a(20) =-3a(21) =7a(22) =-19a(23) =14a(24) =-14a(25) =11a(26) =-23a(27) =32a(28) =-16a(29) =37