Number of n X 3 arrays of occupancy after each element moves to some horizontal or vertical neighbor, without consecutive moves in the same direction.
A221426
Number of n X 3 arrays of occupancy after each element moves to some horizontal or vertical neighbor, without consecutive moves in the same direction.
Terms
- a(0) =0a(1) =42a(2) =236a(3) =4390a(4) =46288a(5) =622615a(6) =7432234a(7) =93888241a(8) =1152556808a(9) =14353368646a(10) =177428523106
External references
- oeis: A221426