Expansion of e.g.f. log(cos(x) + tan(x)).

Terms

a(0) =0a(1) =1a(2) =-2a(3) =7a(4) =-28a(5) =185a(6) =-1352a(7) =12367a(8) =-129568a(9) =1558865a(10) =-21053312a(11) =316097527a(12) =-5218724608a(13) =94003171145