Expansion of e.g.f.: log(1+tan(x)*cosh(x)).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =7a(4) =-26a(5) =165a(6) =-1216a(7) =10827a(8) =-111376a(9) =1316585a(10) =-17441536a(11) =257028847a(12) =-4164440576a(13) =73616009805