Number of nX4 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.
A221896
Number of nX4 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) =13a(1) =2241a(2) =236532a(3) =25821731a(4) =2814706089a(5) =307131177266
External references
- oeis: A221896