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 0 1 to the left or above.
A203968
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 0 1 to the left or above.
Terms
- a(0) =1a(1) =7a(2) =258a(3) =34799a(4) =22100882a(5) =64449537503
External references
- oeis: A203968