Expansion of log(1+sin(x))/cos(x).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =4a(4) =-8a(5) =40a(6) =-121a(7) =768a(8) =-3128a(9) =24320a(10) =-124921a(11) =1152512a(12) =-7158128a(13) =76477440a(14) =-557749921a(15) =6773211136a(16) =-56767019408a(17) =772218880000