Half the number of (n+1)X6 0..2 arrays with every 2X2 subblock having two or three distinct clockwise edge differences.
A210273
Half the number of (n+1)X6 0..2 arrays with every 2X2 subblock having two or three distinct clockwise edge differences.
Terms
- a(0) =129684a(1) =47036870a(2) =17097482699
External references
- oeis: A210273