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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =5a(4) =-24a(5) =154a(6) =-1170a(7) =10394a(8) =-105392a(9) =1201524a(10) =-15210180a(11) =211691380a(12) =-3212711040a(13) =52801793160a(14) =-934299180360