18530502

Appears in sequences

• Number of n X n 0..3 arrays with every nonzero element less than or equal to some NW, E or S neighbor.at n=3A203390
• Number of nX4 0..3 arrays with every nonzero element less than or equal to some NW, E or S neighbor.at n=3A203393
• T(n,k)=Number of nXk 0..3 arrays with every nonzero element less than or equal to some NW, E or S neighbor.at n=24A203397