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..2 nX4 array.
A218229
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..2 nX4 array.
Terms
- a(0) =13a(1) =241a(2) =3969a(3) =63309a(4) =1012165a(5) =16187585a(6) =258892017a(7) =4140512637a(8) =66219989569
External references
- oeis: A218229