Number of 4Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor.
A221725
Number of 4Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor.
Terms
- a(0) =1a(1) =2989a(2) =429160a(3) =81980587a(4) =14223656107
External references
- oeis: A221725