Hilltop maps: number of n X 3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..4 n X 3 array.
A218283
Hilltop maps: number of n X 3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..4 n X 3 array.
Terms
- a(0) =7a(1) =63a(2) =511a(3) =4091a(4) =32739a(5) =261905a(6) =2095233a(7) =16761837a(8) =134094563a(9) =1072755573a(10) =8582037499a(11) =68656243311a(12) =549249492763
External references
- oeis: A218283