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

Terms

a(0) =0a(1) =1a(2) =-3a(3) =10a(4) =-55a(5) =393a(6) =-3485a(7) =36923a(8) =-455306a(9) =6408445a(10) =-101402557a(11) =1782112451a(12) =-34444583072a(13) =726178939315