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

Terms

a(0) =1a(1) =-1a(2) =-2a(3) =-2a(4) =0a(5) =3a(6) =8a(7) =11a(8) =9a(9) =8a(10) =-10a(11) =-31a(12) =-57a(13) =-58a(14) =-107a(15) =-85a(16) =-4a(17) =120a(18) =167a(19) =383a(20) =616a(21) =905a(22) =948a(23) =479a(24) =-82a(25) =-125a(26) =-905a(27) =-3661a(28) =-5937a(29) =-8247