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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =5a(4) =-18a(5) =121a(6) =-792a(7) =7069a(8) =-67088a(9) =763057a(10) =-9443584a(11) =132103157a(12) =-2008841472a(13) =33527321257a(14) =-603694522368