Half the number of (n+1)X4 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.
A209908
Half the number of (n+1)X4 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.
Terms
- a(0) =5008a(1) =295448a(2) =16664508a(3) =948609890a(4) =53888573444
External references
- oeis: A209908