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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =-1a(4) =0a(5) =9a(6) =-45a(7) =447a(8) =-2744a(9) =17553a(10) =-171585a(11) =1757535a(12) =-19723176a(13) =245370969a(14) =-3189613245a(15) =44636677407a(16) =-674857335120