53403

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 11.at n=23A031689
• Numbers n such that n | sigma_3(n) + sigma_2(n) + sigma_1(n) + sigma_0(n).at n=17A058076
• a(n) = 121*n^2 + 2*n.at n=20A181679