Half the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
A210292
Half the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
Terms
- a(0) =112a(1) =78628a(2) =688122928
External references
- oeis: A210292