Expansion of e.g.f.: cosh(x)/cosh(log(1+x)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =3a(4) =-11a(5) =30a(6) =-14a(7) =-525a(8) =4593a(9) =-22428a(10) =17596a(11) =1039995a(12) =-13641275a(13) =96216978a(14) =-105681666a(15) =-8517557685a(16) =148962722881