106776domain: NAppears in sequencesNumbers k such that k and k^2 use only the digits 0, 1, 4, 6 and 7.at n=18A136860Number of nonnegative integers with property that their base 8/3 expansion (see A024645) has n digits.at n=10A245419a(n) is the number of perfect powers m^k with k>=3 (A076467) <= 10^n.at n=15A377934