Number of n X n 0..3 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.
A203093
Number of n X n 0..3 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.
Terms
- a(0) =1a(1) =84a(2) =48552a(3) =308642476
External references
- oeis: A203093