3520628

Appears in sequences

• Half the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having exactly one duplicate clockwise edge difference.at n=5A209780
• Half the number of (n+1)X7 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.at n=0A209785
• T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.at n=15A209787
• T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.at n=20A209787