Expansion of log(1+sinh(sin(x))).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =2a(4) =-6a(5) =16a(6) =-72a(7) =440a(8) =-2800a(9) =20224a(10) =-169984a(11) =1582976a(12) =-16076544a(13) =178612864a(14) =-2155087872a(15) =27969867008a(16) =-388732745728