Number of n X 2 arrays of occupancy after each element stays put or moves to some king-move neighbor.
A221223
Number of n X 2 arrays of occupancy after each element stays put or moves to some king-move neighbor.
Terms
- a(0) =3a(1) =35a(2) =400a(3) =4525a(4) =51025a(5) =574800a(6) =6473175a(7) =72891475a(8) =820773600a(9) =9242002325a(10) =104065684825
External references
- oeis: A221223