19617781

Appears in sequences

• Number of n X 3 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.at n=3A203186
• Number of nX4 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.at n=2A203187
• T(n,k)=Number of nXk 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.at n=17A203191
• T(n,k)=Number of nXk 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.at n=18A203191