256067697domain: NAppears in sequencesNumber of (n+1) X (4+1) 0..2 arrays with every 2 X 2 subblock summing to 2, 4, or 6.at n=4A251331Number of (n+1) X (5+1) 0..2 arrays with every 2 X 2 subblock summing to 2 4 or 6.at n=3A251332T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock summing to 2 4 or 6.at n=31A251335