Number of n X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor.
A221120
Number of n X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor.
Terms
- a(0) =1a(1) =21a(2) =4872a(3) =16436223a(4) =723234356389
External references
- oeis: A221120