Expansion of e.g.f.: log(1+tanh(x)*cos(x)).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =-3a(4) =14a(5) =-35a(6) =-16a(7) =1057a(8) =-10256a(9) =59865a(10) =-7936a(11) =-5446683a(12) =85543424a(13) =-726781835a(14) =-22368256a(15) =133713611977a(18) =-209865342976