Number of n X n 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors.
A208169
Number of n X n 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors.
Terms
- a(0) =1a(1) =13a(2) =8469a(3) =99752346
External references
- oeis: A208169