Half the number of (n+1)X4 0..2 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.
A209791
Half the number of (n+1)X4 0..2 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.
Terms
- a(0) =1380a(1) =49056a(2) =1732554a(3) =61289190a(4) =2167312950a(5) =76648760118
External references
- oeis: A209791