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

Terms

a(0) =0a(1) =1a(2) =-2a(3) =9a(4) =-51a(5) =384a(6) =-3506a(7) =38126a(8) =-479770a(9) =6872392a(10) =-110410296a(11) =1967181840a(12) =-38502498592a(13) =821352161200