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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =-1a(4) =6a(5) =1a(6) =-72a(7) =55a(8) =1456a(9) =-2207a(10) =-47104a(11) =79727a(12) =2390784a(13) =-2834207a(14) =-180612096a(15) =81045991a(16) =18625189888a(17) =1107720001a(19) =-715785186337