Number of nX4 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.
A221398
Number of nX4 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.
Terms
- a(0) =0a(1) =56a(2) =2110a(3) =89173a(4) =3658806a(5) =149231797a(6) =6054851040a(7) =244978992940
External references
- oeis: A221398