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

Terms

a(0) =1a(1) =1a(2) =4a(3) =19a(4) =118a(5) =886a(6) =7786a(7) =78184a(8) =881644a(9) =11017108a(10) =150966856a(11) =2249261356a(12) =36181351504a(13) =624658612384