Half the number of (n+1)X7 0..2 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.
A209794
Half the number of (n+1)X7 0..2 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.
Terms
- a(0) =428676a(1) =182095128a(2) =76648760118
External references
- oeis: A209794