872455004

Appears in sequences

• Half the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having at most one duplicate clockwise edge difference.at n=6A210293
• Half the number of (n+1)X8 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.at n=0A210299
• T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.at n=21A210300