Hilltop maps: number of n X 3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 n X 3 array.
A221441
Hilltop maps: number of n X 3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 n X 3 array.
Terms
- a(0) =5a(1) =33a(2) =221a(3) =1473a(4) =9829a(5) =65569a(6) =437437a(7) =2918273a(8) =19468741a(9) =129882145a(10) =866485149a(11) =5780598081a(12) =38564209189a(13) =257274109985
External references
- oeis: A221441