Number of 3Xn arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without 2-loops or left turns.
A221830
Number of 3Xn 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) =14a(2) =202a(3) =2879a(4) =40983a(5) =583419a(6) =8304016a(7) =118195328a(8) =1682332699a(9) =23945477164a(10) =340827864824
External references
- oeis: A221830