409185domain: NAppears in sequencesColumn 5 of A048790.at n=9A094161Odd primitive abundant numbers n such that n = x^2 + x + y^2 with y^2 < 2*x; a subsequence of A006038.at n=18A136476Expansion of e.g.f. cosh( x^2/2 )/ (1-x).at n=9A193385Nondeficient numbers k for which A324644(k)/A324198(k) = 2.at n=15A387165