Hilltop maps: number of nX4 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..2 nX4 array.
A219059
Hilltop maps: number of nX4 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..2 nX4 array.
Terms
- a(0) =13a(1) =249a(2) =4049a(3) =64577a(4) =1032785a(5) =16520553a(6) =264274797a(7) =4227506465a(8) =67625780417
External references
- oeis: A219059