Number of n X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2.
A221250
Number of n X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2.
Terms
- a(0) =0a(1) =4a(2) =30a(3) =58081a(4) =78633756
External references
- oeis: A221250