E.g.f.: exp(x*exp(x) + 1/3*x^3*exp(x)^3).

Terms

a(0) =1a(1) =1a(2) =3a(3) =12a(4) =73a(5) =556a(6) =4737a(7) =44122a(8) =453441a(9) =5186664a(10) =65671201a(11) =906052654a(12) =13418086497a(13) =211472682604