Half the number of (n+1)X4 0..2 arrays with every 2X2 subblock having two or three distinct clockwise edge differences.
A210271
Half the number of (n+1)X4 0..2 arrays with every 2X2 subblock having two or three distinct clockwise edge differences.
Terms
- a(0) =2130a(1) =113248a(2) =6028871a(3) =321050788a(4) =17097482699a(5) =910532241954
External references
- oeis: A210271