Half the number of (n+1)X4 0..2 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
A209946
Half the number of (n+1)X4 0..2 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
Terms
- a(0) =1956a(1) =95794a(2) =4681176a(3) =228881560a(4) =11189540644a(5) =547050257224
External references
- oeis: A209946