Expansion of e.g.f. exp(x * exp(3*x)).

Terms

a(0) =1a(1) =1a(2) =7a(3) =46a(4) =361a(5) =3436a(6) =37729a(7) =463366a(8) =6280369a(9) =93015352a(10) =1491337441a(11) =25684077706a(12) =472217487625