Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 4 1's.
A295114
Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 4 1's.
Terms
- a(0) =1a(1) =5a(2) =26a(3) =326a(4) =8257a(5) =420519a(6) =43655680a(7) =9196006628
External references
- oeis: A295114