Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 4 neighboring 1's.
A297727
Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 4 neighboring 1's.
Terms
- a(0) =1a(1) =2a(2) =17a(3) =93a(4) =2719a(5) =65215a(6) =6241242a(7) =959915987a(8) =322119198752
External references
- oeis: A297727