2548972

Appears in sequences

• Half the number of nX3 0..3 arrays with no element equal to the average of its horizontal and vertical neighbors.at n=3A197104
• Half the number of nX4 0..3 arrays with no element equal to the average of its horizontal and vertical neighbors.at n=2A197105
• T(n,k)=Half the number of nXk 0..3 arrays with no element equal to the average of its horizontal and vertical neighbors.at n=17A197109
• T(n,k)=Half the number of nXk 0..3 arrays with no element equal to the average of its horizontal and vertical neighbors.at n=18A197109