Hilltop maps: number of nX3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..3 nX3 array.
A218633
Hilltop maps: number of nX3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..3 nX3 array.
Terms
- a(0) =7a(1) =63a(2) =511a(3) =4087a(4) =32689a(5) =261505a(6) =2092027a(7) =16736081a(8) =133887639a(9) =1071093011a(10) =8568679227a(11) =68548914887a(12) =548387167731
External references
- oeis: A218633