Number of n X 3 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.
A221375
Number of n X 3 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.
Terms
- a(0) =7a(1) =139a(2) =3017a(3) =68006a(4) =1548941a(5) =35365731a(6) =807887304a(7) =18456843366a(8) =421665253450
External references
- oeis: A221375