Number of (n+1)X(7+1) 0..3 arrays with every 2X2 subblock summing to 3 4 5 6 7 8 or 9.

A251506

Number of (n+1)X(7+1) 0..3 arrays with every 2X2 subblock summing to 3 4 5 6 7 8 or 9.

Terms

    a(0) =1988695378

External references