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

Terms

a(0) =1a(1) =-2a(2) =-2a(3) =2a(4) =3a(5) =6a(6) =-1a(7) =-2a(8) =-10a(9) =-14a(10) =-7a(11) =-2a(12) =11a(13) =26a(14) =43a(15) =30a(16) =28a(17) =-6a(18) =-40a(19) =-92a(20) =-128a(21) =-132a(22) =-115a(23) =-48a(24) =54a(25) =200a(26) =339a(27) =484a(28) =499a(29) =476