226185domain: NAppears in sequencesNumbers k that divide the sum of the digits of (k!)^2.at n=26A108862Numbers of the form m = p1 * p2 * p3 * p4 where for each d|m we have (d+m/d)/2 prime and p1 < p2 < p3 < p4 each prime.at n=29A128285