Half the number of (n+1)X3 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
A210294
Half the number of (n+1)X3 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
Terms
- a(0) =1578a(1) =78628a(2) =3913002a(3) =194768054a(4) =9694276684a(5) =482519042626
External references
- oeis: A210294