Half the number of (n+1)X4 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
A210295
Half the number of (n+1)X4 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
Terms
- a(0) =22212a(1) =3913002a(2) =688122928a(3) =121040117840
External references
- oeis: A210295