119048domain: NAppears in sequencesNumbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 30.at n=22A031708a(n) = 225*n^2 + n.at n=22A156814a(n) = 529*n^2 + 23.at n=15A158631a(n) = Sum_{k=0..floor(n/3)} (n-2*k+1) * binomial(n-2*k,k)^2.at n=15A375565