666648

Appears in sequences

• T(n,n-1), array T as in A047140.at n=11A047143
• Number of n X 3 0..4 arrays with each element equal to the number its horizontal and vertical neighbors equal to itself.at n=25A195964
• Number of nX6 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=7A300637