386404domain: NAppears in sequencesNumber of (n+1) X 3 0..3 arrays with every 2 X 2 subblock summing to 6.at n=7A183635Number of (n+1)X9 0..3 arrays with every 2x2 subblock summing to 6.at n=1A183641T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock summing to 6.at n=37A183642