Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction.
A221509
Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction.
Terms
- a(0) =0a(1) =64a(2) =664a(3) =31663a(4) =730874a(5) =22664752a(6) =617892584a(7) =17782943460a(8) =499912745268
External references
- oeis: A221509