Hilltop maps: number of n X 3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 n X 3 array.
A218587
Hilltop maps: number of n X 3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 n X 3 array.
Terms
- a(0) =7a(1) =57a(2) =449a(3) =3567a(4) =28305a(5) =224643a(6) =1782855a(7) =14149449a(8) =112295673a(9) =891223263a(10) =7073103393a(11) =56134970523a(12) =445509522567
External references
- oeis: A218587