1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having two or three distinct clockwise edge differences.
A210327
1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having two or three distinct clockwise edge differences.
Terms
- a(0) =39a(1) =11877a(2) =27838382a(3) =517186072378
External references
- oeis: A210327