Number of n X 3 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.
A208170
Number of n X 3 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) =5a(1) =159a(2) =8469a(3) =473928a(4) =26625693a(5) =1496307201a(6) =84091222866
External references
- oeis: A208170