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

Terms

a(0) =1a(1) =0a(2) =1a(3) =-3a(4) =24a(5) =-120a(6) =990a(7) =-7140a(8) =69048a(9) =-658728a(10) =7542960a(11) =-89216160a(12) =1191378408a(13) =-16691737920a(14) =255303337016