531495domain: NAppears in sequencesNumbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 27.at n=26A031705a(n) = 729*n^2 + 2*n.at n=26A158396a(n) = n^6 + 6n.at n=9A180356a(n) = n*(n^3 + 2).at n=27A185065a(n) = 9^n + 9*n.at n=6A221911