509824

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 51.at n=13A031729
• Number of 4-step king's tours on an n X n board summed over all starting positions.at n=38A186863
• Irregular table read by rows: T(n,k) is the number of k-gons, k>=3, formed in a square with edge length 1 by straight line segments when connecting the internal edge points that divide the sides into segments with lengths equal to the Farey series of order n to the equivalent points on the opposite side of the square.at n=40A359656