6524235domain: NAppears in sequencesNumbers k such that k^2 contains exactly 2 copies of each digit of k.at n=22A114258Numbers k such that k and k^2 use only the digits 2, 3, 4, 5 and 6.at n=36A137067Numbers k such that the decimal expansions of both k and k^2 have 2 as smallest digit and 6 as largest digit.at n=7A249915