Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without 2-loops or left turns.
A221891
Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without 2-loops or left turns.
Terms
- a(0) =0a(1) =0a(2) =8a(3) =37a(4) =169a(5) =811a(6) =3878a(7) =18502a(8) =88302a(9) =421463a(10) =2011587a(11) =9601013a(12) =45824300a(13) =218713020a(14) =1043886804a(15) =4982326441a(16) =23779950797a(17) =113498396063a(18) =541712050514
External references
- oeis: A221891