71163896domain: NAppears in sequencesNumber of (n+1) X (2+1) 0..3 arrays with every 2 X 2 subblock summing to 3 6 or 9.at n=6A251294Number of (n+1)X(7+1) 0..3 arrays with every 2X2 subblock summing to 3 6 or 9.at n=1A251299T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock summing to 3 6 or 9.at n=29A251300