Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with every occupancy equal to zero or two.
A221406
Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with every occupancy equal to zero or two.
Terms
- a(0) =0a(1) =120a(2) =0a(3) =47156a(4) =0a(5) =18852560a(6) =0a(7) =7505597654a(8) =0a(10) =0a(12) =0a(14) =0a(16) =0a(18) =0a(20) =0
External references
- oeis: A221406