Hilltop maps: number of n X n binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..4 n X n array.
A218280
Hilltop maps: number of n X n binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..4 n X n array.
Terms
- a(0) =1a(1) =15a(2) =511a(3) =65507a(4) =33549827a(5) =68710447465
External references
- oeis: A218280