Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 2 1's.
A295034
Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 2 1's.
Terms
- a(0) =1a(1) =10a(2) =140a(3) =6686a(4) =898493a(5) =355281224a(6) =411280569141
External references
- oeis: A295034