T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock diagonal maximum minus antidiagonal maximum unequal to its neighbors horizontally and vertically.

A253731

T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock diagonal maximum minus antidiagonal maximum unequal to its neighbors horizontally and vertically.