Hilltop maps: number of n X 4 binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..3 n X 4 array.
A218238
Hilltop maps: number of n X 4 binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..3 n X 4 array.
Terms
- a(0) =15a(1) =255a(2) =4095a(3) =65535a(4) =1048545a(5) =16776705a(6) =268427265a(7) =4294836225a(8) =68717379375
External references
- oeis: A218238