Number of n X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 neighboring 1's.
A297218
Number of n X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 neighboring 1's.
Terms
- a(0) =1a(1) =4a(2) =24a(3) =207a(4) =5570a(5) =261939a(6) =20599895a(7) =3819208252
External references
- oeis: A297218