Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1's.
A295199
Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1's.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =42a(4) =438a(5) =8241a(6) =279663a(7) =17574795a(8) =2023191364a(9) =425872679440
External references
- oeis: A295199