Expansion of e.g.f. exp(exp(exp(x)-1)-1).

Terms

a(0) =1a(1) =1a(2) =3a(3) =12a(4) =60a(5) =358a(6) =2471a(7) =19302a(8) =167894a(9) =1606137a(10) =16733779a(11) =188378402a(12) =2276423485a(13) =29367807524a(14) =402577243425