Number of nX4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.
A221232
Number of nX4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.
Terms
- a(0) =4a(1) =852a(2) =54075a(3) =3618339a(4) =245539157a(5) =16783348483
External references
- oeis: A221232