10710000domain: NAppears in sequencesNumbers k such that k and k^2 use only the digits 0, 1, 3, 4 and 7.at n=19A136839Numbers k such that k and k^2 use only the digits 0, 1, 4, 6 and 7.at n=38A136860Numbers k such that k and k^2 use only the digits 0, 1, 4 and 7.at n=13A136863