240506

Appears in sequences

• Half the number of n X n binary matrices differing in at most one position between adjacent rows and at most one position between adjacent columns.at n=10A140336
• Number of nX5 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..1 nX5 array.at n=8A219288