Number of 6Xn 0..6+n-2 arrays with upper left zero and lower right 6+n-2 and each element differing from its horizontal and antidiagonal neighbors by one or two.

A265471

Number of 6Xn 0..6+n-2 arrays with upper left zero and lower right 6+n-2 and each element differing from its horizontal and antidiagonal neighbors by one or two.