1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having one or three distinct clockwise edge differences.
A210069
1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having one or three distinct clockwise edge differences.
Terms
- a(0) =33a(1) =7653a(2) =11333893a(3) =114628150378
External references
- oeis: A210069