Expansion of log(1+sinh(x))/exp(x).

Terms

a(0) =0a(1) =1a(2) =-3a(3) =9a(4) =-32a(5) =140a(6) =-757a(7) =4963a(8) =-38376a(9) =341664a(10) =-3438641a(11) =38576747a(12) =-477118600a(13) =6447914668a(14) =-94515392805