27255

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=16A031689
• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1111-0100-0100 pattern in any orientation.at n=15A146829
• a(n) = 121*n^2 + 2*n.at n=14A181679