Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without 2-loops.
A221352
Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without 2-loops.
Terms
- a(0) =0a(1) =1a(2) =18a(3) =148a(4) =1164a(5) =8824a(6) =65932a(7) =489456a(8) =3622896a(9) =26780480a(10) =197840840a(11) =1461141856a(12) =10789799120a(13) =79672591776a(14) =588291947152
External references
- oeis: A221352