Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 neighboring 1.
A297389
Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 neighboring 1.
Terms
- a(0) =1a(1) =5a(2) =19a(3) =126a(4) =3175a(5) =99682a(6) =4279111a(7) =540319235a(8) =108762242579
External references
- oeis: A297389