Hilltop maps: number of n X 3 binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..3 n X 3 array.
A218237
Hilltop maps: number of n X 3 binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..3 n X 3 array.
Terms
- a(0) =7a(1) =63a(2) =511a(3) =4095a(4) =32753a(5) =262017a(6) =2096129a(7) =16769025a(8) =134152151a(9) =1073216767a(10) =8585730559a(11) =68685815807a(12) =549486297185
External references
- oeis: A218237