492856domain: NAppears in sequencesNumbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 27.at n=25A031705Number of 8k+-3 primes (A003629) in range [2^n,2^(n+1)].at n=23A095014a(n) = 729*n^2 + 2*n.at n=25A158396