Half the number of (n+1)X7 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
A210298
Half the number of (n+1)X7 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
Terms
- a(0) =61973516a(1) =482519042626
External references
- oeis: A210298