Hilltop maps: number of nX3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..2 nX3 array.
A218228
Hilltop maps: number of nX3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..2 nX3 array.
Terms
- a(0) =7a(1) =61a(2) =497a(3) =3969a(4) =31739a(5) =253825a(6) =2029849a(7) =16232833a(8) =129815047a(9) =1038139593a(10) =8302071585a(11) =66392220265a(12) =530943014251
External references
- oeis: A218228