Number of n X 3 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.
A221689
Number of n X 3 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.
Terms
- a(0) =6a(1) =152a(2) =3112a(3) =63676a(4) =1302720a(5) =26650988a(6) =545221260a(7) =11154026300a(8) =228186749552
External references
- oeis: A221689