Half the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having at most one duplicate clockwise edge difference.
A210293
Half the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having at most one duplicate clockwise edge difference.
Terms
- a(0) =112a(1) =1578a(2) =22212a(3) =312704a(4) =4402192a(5) =61973516a(6) =872455004a(7) =12282307884a(8) =172908727756
External references
- oeis: A210293