Expansion of e.g.f. exp(x / (1 - x^3)^2).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =49a(5) =241a(6) =721a(7) =16801a(8) =204961a(9) =1276129a(10) =19968481a(11) =417479041a(12) =4522597201a(13) =62399971921