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..1 nX3 array.
A218421
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..1 nX3 array.
Terms
- a(0) =5a(1) =49a(2) =357a(3) =2725a(4) =20793a(5) =158429a(6) =1207525a(7) =9203377a(8) =70144889a(9) =534620525a(10) =4074695269a(11) =31055936969a(12) =236697756661
External references
- oeis: A218421