Number of nX6 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.
A203189
Number of nX6 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.
Terms
- a(0) =1121a(1) =15703631a(2) =117061422325
External references
- oeis: A203189