Number of nX4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without 2-loops or left turns.
A221826
Number of nX4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without 2-loops or left turns.
Terms
- a(0) =0a(1) =73a(2) =2879a(3) =115417a(4) =4755445a(5) =194407111a(6) =7954432829a(7) =325446165881
External references
- oeis: A221826