357627domain: NAppears in sequencesNumbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 52.at n=22A031730a(n) = (2*n+1)*(2*n+3)*(2*n+5).at n=34A061550a(n) = (4*n+1)*(4*n+3)*(4*n+5).at n=17A133766a(n) = 529*n^2 + 23.at n=26A158631