Expansion of e.g.f. -log(cos(x) - log(x+1)).

Terms

a(0) =0a(1) =1a(2) =1a(3) =4a(4) =7a(5) =53a(6) =215a(7) =1895a(8) =12122a(9) =132205a(10) =1144627a(11) =14912291a(12) =164213696a(13) =2477432371a(14) =33228911417a(15) =569758644845