Expansion of 1/(Sum_{k>=0} x^(k^3))^3.

Terms

a(0) =1a(1) =-3a(2) =6a(3) =-10a(4) =15a(5) =-21a(6) =28a(7) =-36a(8) =42a(9) =-43a(10) =36a(11) =-18a(12) =-14a(13) =63a(14) =-132a(15) =224a(16) =-336a(17) =459a(18) =-578a(19) =672a(20) =-714a(21) =671a(22) =-504a(23) =168a(24) =378a(25) =-1161a(26) =2184a(27) =-3419a(28) =4794a(29) =-6183