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

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =28a(5) =201a(6) =1566a(7) =14349a(8) =154456a(9) =1870225a(10) =25034650a(11) =368887573a(12) =5938767924a(13) =103580577881