81243904domain: NAppears in sequencesNumber of (n+1)X(3+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 6.at n=6A233677Number of (n+1)X(7+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 6.at n=2A233681