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

Terms

a(0) =1a(1) =0a(2) =-1a(3) =-6a(4) =-31a(5) =-140a(6) =-577a(7) =-1498a(8) =6785a(9) =192840a(10) =2667711a(11) =31783730a(12) =353106657a(13) =3771795196a(14) =38270910975a(15) =356214219678