Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 2, 3 or 4 1's.
A295600
Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 2, 3 or 4 1's.
Terms
- a(0) =2a(1) =8a(2) =83a(3) =2305a(4) =201602a(5) =59562253a(6) =59768294027
External references
- oeis: A295600