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..3 n X n array.
A218188
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..3 n X n array.
Terms
- a(0) =1a(1) =15a(2) =507a(3) =65251a(4) =33407143a(5) =68410191725
External references
- oeis: A218188