Expansion of e.g.f.: sech(sin(x)*exp(x)).

Terms

a(0) =1a(1) =0a(2) =-1a(3) =-6a(4) =-15a(5) =60a(6) =1023a(7) =6062a(8) =-9247a(9) =-652680a(10) =-7332289a(11) =-13792350a(12) =994947921a(13) =19248140340a(14) =119312444223