Number of 4Xn arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.
A221812
Number of 4Xn 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) =1a(1) =233a(2) =3426a(3) =197048a(4) =5873327a(5) =239116581a(6) =8354914378a(7) =314589265052
External references
- oeis: A221812