Number of 2 X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.
A221484
Number of 2 X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.
Terms
- a(0) =0a(1) =4a(2) =8a(3) =73a(4) =292a(5) =1713a(6) =8235a(7) =43733a(8) =220672a(9) =1142790a(10) =5840082a(11) =30047605a(12) =154064032a(13) =791329272a(14) =4060908537a(15) =20849136414a(16) =107016685715a(17) =549372170263
External references
- oeis: A221484