Number of 3Xn arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.
A221811
Number of 3Xn arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.
Terms
- a(0) =0a(1) =41a(2) =154a(3) =3906a(4) =32636a(5) =486331a(6) =5202774a(7) =66756344a(8) =772945086a(9) =9475253764a(10) =112494210565
External references
- oeis: A221811