27282224128domain: NAppears in sequencesExpansion of e.g.f. cos(x)*cos(sinh(x)), even powers only.at n=10A009098Expansion of e.g.f.: cosh(sin(x))/exp(x).at n=20A009145Expansion of e.g.f.: cosh(x)/exp(sin(x)).at n=20A009184