277153898751domain: NAppears in sequencesNumber of (n+1) X (5+1) 0..2 arrays with every 2 X 2 subblock summing to 2 4 or 6.at n=5A251332Number of (n+1)X(6+1) 0..2 arrays with every 2X2 subblock summing to 2 4 or 6.at n=4A251333