Number of nX4 0..3 arrays with every nonzero element less than or equal to some NW, E or S neighbor.
A203393
Number of nX4 0..3 arrays with every nonzero element less than or equal to some NW, E or S neighbor.
Terms
- a(0) =1a(1) =1455a(2) =210342a(3) =18530502a(4) =1650100394a(5) =156174348536
External references
- oeis: A203393