86867366

Appears in sequences

• Half the number of lower triangles of an (n+1) X (n+1) 0..3 array with no element equal to the average of its horizontal and vertical neighbors.at n=3A194610
• 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=18A194615
• Half the number of lower triangles of a 5 X 5 0..n array with no element equal to the average of its horizontal and vertical neighbors.at n=2A194618