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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =-2a(4) =6a(5) =5a(6) =15a(7) =-772a(8) =5348a(9) =-28579a(10) =304875a(11) =-4039686a(12) =44824626a(13) =-502746231a(14) =6786025155a(15) =-100850039760