1049000domain: NAppears in sequencesNumbers k such that k and k^2 have square decimal digits.at n=13A077439Numbers k such that k and k^2 use only the digits 0, 1, 3, 4 and 9.at n=30A136841Numbers k such that k and k^2 use only the digits 0, 1, 4, 5 and 9.at n=31A136858Numbers k such that sum of digits of k^2 is 7.at n=29A262711