Number of 4 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor.
A221248
Number of 4 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor.
Terms
- a(0) =0a(1) =441a(2) =21660a(3) =4096576a(4) =438377904a(5) =56606878084
External references
- oeis: A221248