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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =0a(4) =-6a(5) =55a(6) =-255a(7) =1358a(8) =-12572a(9) =125613a(10) =-1193805a(11) =12576124a(12) =-154247874a(13) =2040358307a(14) =-28319064683a(15) =421795555530