Number of n X 4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without 2-loops.
A221238
Number of n X 4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without 2-loops.
Terms
- a(0) =0a(1) =467a(2) =67710a(3) =8959341a(4) =1130617545a(5) =141336723259
External references
- oeis: A221238