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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =4a(4) =-15a(5) =93a(6) =-633a(7) =5381a(8) =-51506a(9) =565957a(10) =-6922205a(11) =93992413a(12) =-1398890284a(13) =22689478823a(14) =-398141898399