254034domain: NAppears in sequencesNumbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 56.at n=17A031734Number of tilings of 2 X n rectangle with polyominoes, each of which has area = # of adjacent polyominoes.at n=23A044043a(n) = 324*n^2 + 18.at n=28A158590