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

Terms

a(0) =1a(1) =0a(2) =1a(3) =3a(4) =16a(5) =70a(6) =580a(7) =3850a(8) =39940a(9) =350544a(10) =4408460a(11) =48605788a(12) =715662176a(13) =9518173080a(14) =160469679136