Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.
A221900
Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.
Terms
- a(0) =6a(1) =266a(2) =7667a(3) =236532a(4) =7235107a(5) =221465158a(6) =6778558415a(7) =207481075456
External references
- oeis: A221900