Number of nX3 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without consecutive moves in the same direction.
A221871
Number of nX3 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without consecutive moves in the same direction.
Terms
- a(0) =0a(1) =162a(2) =2847a(3) =109441a(4) =2902629a(5) =89325897a(6) =2568285560a(7) =75961646488
External references
- oeis: A221871