155025domain: NAppears in sequencesNumbers k that can be expressed as k = w + x = y*z with w*x = y^2 + z^2 where w, x, y, and z are all positive integers.at n=26A057373Numbers k such that the first k digits of e form a prime.at n=7A064118Number of interval posets of permutations with n minimal elements.at n=9A348479