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..3 nX3 array.
A218367
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..3 nX3 array.
Terms
- a(0) =7a(1) =63a(2) =509a(3) =4081a(4) =32641a(5) =261121a(6) =2088955a(7) =16711551a(8) =133691649a(9) =1069527065a(10) =8556167553a(11) =68448948737a(12) =547588456455
External references
- oeis: A218367