Number of n X n arrays of occupancy after each element moves to some horizontal or vertical neighbor but without 2-loops.
A217339
Number of n X n arrays of occupancy after each element moves to some horizontal or vertical neighbor but without 2-loops.
Terms
- a(0) =0a(1) =1a(2) =144a(3) =120908a(4) =838126848
External references
- oeis: A217339