Hilltop maps: number of nX4 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..3 nX4 array.
A218368
Hilltop maps: number of nX4 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..3 nX4 array.
Terms
- a(0) =15a(1) =253a(2) =4081a(3) =65409a(4) =1046529a(5) =16744435a(6) =267910753a(7) =4286570153a(8) =68585092161
External references
- oeis: A218368