99255domain: NAppears in sequencesNumbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 21.at n=14A031699a(n) = 441n^2 + 2n.at n=14A158321a(n) = prime(2^(n+1)) - 2*prime(2^n).at n=16A197072Sum of the smallest parts of the partitions of 4n into 4 parts.at n=29A238702