31943268634domain: NAppears in sequencesExpansion of e.g.f. exp(x) / (2 - cosh(x)).at n=15A327034E.g.f.: -log(2 - cosh(x)) (even powers only).at n=8A331978E.g.f.: (exp(-x) - exp(x) - 2)/(exp(-x) + exp(x) - 4).at n=15A375381