Expansion of log(1+sinh(x))*cos(x).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =0a(4) =-4a(5) =20a(6) =-121a(7) =896a(8) =-7344a(9) =68304a(10) =-711721a(11) =8200192a(12) =-103603204a(13) =1424807488a(14) =-21191898001a(15) =339004274688