Half the number of (n+1)X6 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.
A209784
Half the number of (n+1)X6 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.
Terms
- a(0) =397734a(1) =122871278a(2) =36572974507
External references
- oeis: A209784