Half the number of (n+1)X6 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.
A209910
Half the number of (n+1)X6 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.
Terms
- a(0) =399930a(1) =152153160a(2) =53888573444
External references
- oeis: A209910