53387

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 21 ones.at n=33A031789
• Number of n X 2 0..1 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.at n=14A202973
• Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..2 n X 2 array.at n=29A219293