8130801167domain: NAppears in sequencesNumber of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to 2 4 or 6.at n=4A251327Number of (n+1) X (5+1) 0..2 arrays with every 2 X 2 subblock summing to 2 4 or 6.at n=4A251332