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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =3a(4) =0a(5) =-45a(6) =465a(7) =-3759a(8) =22232a(9) =-70059a(10) =-1060245a(11) =28407599a(12) =-453971496a(13) =5589320503a(14) =-48353999603a(15) =7539772397