Number of n X n 0..2 arrays with every 1 immediately preceded by 0 to the left or above, and every 2 immediately preceded by both a 1 and a 0.
A203364
Number of n X n 0..2 arrays with every 1 immediately preceded by 0 to the left or above, and every 2 immediately preceded by both a 1 and a 0.
Terms
- a(0) =1a(1) =9a(2) =206a(3) =25087a(4) =12450511a(5) =27758308569
External references
- oeis: A203364