101790domain: NAppears in sequencesNumbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 22.at n=29A031700a(n) = 841*n^2 + 29.at n=11A158665a(n) = 121*n^2 + n.at n=28A173267Numbers <= 10^6 with valid Luhn mod 10 check digit, sorted first by check digit, then lexicographically.at n=20A249855