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

Terms

a(0) =1a(1) =0a(2) =1a(3) =-3a(4) =16a(5) =-90a(6) =616a(7) =-4893a(8) =44416a(9) =-453540a(10) =5145856a(11) =-64222983a(12) =874402816a(13) =-12897183390a(14) =204862698496