Expansion of e.g.f.: exp(sin(x)/cosh(x)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =-3a(4) =-15a(5) =-3a(6) =297a(7) =1113a(8) =-6783a(9) =-77063a(10) =70609a(11) =5509845a(12) =18558705a(13) =-430006731a(14) =-4027228359a(15) =33282260529a(16) =727421677185