Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 2 or 4 1's.
A295373
Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 2 or 4 1's.
Terms
- a(0) =2a(1) =8a(2) =74a(3) =1634a(4) =85310a(5) =10437240a(6) =2995361770
External references
- oeis: A295373