205801866

Appears in sequences

• Half the number of lower triangles of an (n+1) X (n+1) 0..2 array with no element equal to the average of its horizontal and vertical neighbors.at n=4A194609
• T(n,k) = Half the number of lower triangles of an (n+1) X (n+1) 0..k array with no element equal to the average of its horizontal and vertical neighbors.at n=19A194615
• Half the number of lower triangles of a 6 X 6 0..n array with no element equal to the average of its horizontal and vertical neighbors.at n=1A194619