Half the number of n X n 0..3 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.
A183576
Half the number of n X n 0..3 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.
Terms
- a(0) =0a(1) =14a(2) =814a(3) =240358a(4) =320224986
External references
- oeis: A183576