Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor.
A221246
Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor.
Terms
- a(0) =0a(1) =9a(2) =50a(3) =484a(4) =3864a(5) =32400a(6) =267264a(7) =2214144a(8) =18316800a(9) =151585344a(10) =1254325824a(11) =10379534400a(12) =85889605824a(13) =710729930304
External references
- oeis: A221246