4681176

Appears in sequences

• Half the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.at n=2A209943
• Half the number of (n+1)X4 0..2 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.at n=2A209946
• T(n,k) is the half the number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock having at most one duplicate clockwise edge difference.at n=12A209951