Half the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences.
A209529
Half the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences.
Terms
- a(0) =5a(1) =25a(2) =257a(3) =6145a(4) =262145a(5) =25165825a(6) =4294967297
External references
- oeis: A209529