Half the number of (n+1)X7 0..2 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
A209949
Half the number of (n+1)X7 0..2 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
Terms
- a(0) =852768a(1) =684469520a(2) =547050257224
External references
- oeis: A209949