Number of nX4 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with no occupancy greater than 2.
A221299
Number of nX4 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with no occupancy greater than 2.
Terms
- a(0) =17a(1) =1001a(2) =63285a(3) =4119299a(4) =270434991a(5) =17788952657
External references
- oeis: A221299