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

Terms

a(0) =1a(1) =0a(2) =-1a(3) =-6a(4) =-23a(5) =-60a(6) =-1a(7) =1526a(8) =15121a(9) =106344a(10) =579359a(11) =1870418a(12) =-8716487a(13) =-251210388a(14) =-3217413473a(15) =-31518844530a(16) =-245728084447