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

Terms

a(0) =1a(1) =1a(2) =0a(3) =-1a(4) =4a(5) =17a(6) =-24a(7) =-201a(8) =848a(9) =7041a(10) =-25792a(11) =-291025a(12) =1491392a(13) =18979729a(14) =-106879616a(15) =-1597285977a(16) =10504954112a(17) =176766161281