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

Terms

a(0) =0a(1) =1a(2) =-2a(3) =9a(4) =-55a(5) =434a(6) =-4180a(7) =47590a(8) =-625770a(9) =9339880a(10) =-156097760a(11) =2889491800a(12) =-58706203400