Expansion of e.g.f. log(1+sinh(x))/cos(x).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =6a(4) =-16a(5) =100a(6) =-481a(7) =3640a(8) =-26216a(9) =244560a(10) =-2364841a(11) =26849504a(12) =-325189096a(13) =4398704960a(14) =-63781044601