Hilltop maps: number of n X 4 binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..1 n X 4 array.
A218659
Hilltop maps: number of n X 4 binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..1 n X 4 array.
Terms
- a(0) =9a(1) =225a(2) =3249a(3) =50625a(4) =793881a(5) =12383361a(6) =193349025a(7) =3018953025a(8) =47135449449a(9) =735942652641
External references
- oeis: A218659