390615domain: NAppears in sequencesMonotonic ordering of nonnegative differences 5^i-10^j, for 40>= i>=0, j>=0.at n=28A192201Values x for record minima of the positive distance d between the square of an integer y and the fifth power of a positive integer x such that d = y^2 - x^5 (x <> k^2 and y <> k^5).at n=28A198444