88242domain: NAppears in sequencesNumbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 18.at n=33A031696Numbers with exactly 5 distinct prime factors each of which is a palindrome.at n=20A046403n times the n-th n-gonal number.at n=21A117665a(n) = 1089*n^2 + 33.at n=9A158688