Expansion of exp(tan(x)*cosh(x)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =6a(4) =21a(5) =92a(6) =597a(7) =3472a(8) =26537a(9) =209488a(10) =1834249a(11) =17750304a(12) =180938109a(13) =2024471360a(14) =23781199197a(15) =300235771648