302520domain: NAppears in sequencesExpansion of e.g.f. cosh(sinh(x)*exp(x)).at n=9A009153Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 55.at n=9A031733G.f. satisfies: A(x) = (1+x)/(1-x) * A(x^2)*A(x^3)*A(x^4)*...*A(x^n)*... .at n=26A318767