Number of (n+1) X (7+1) 0..2 arrays with every 2 X 2 subblock summing to 1 2 3 4 5 6 or 7.

A251372

Number of (n+1) X (7+1) 0..2 arrays with every 2 X 2 subblock summing to 1 2 3 4 5 6 or 7.