421064386

Appears in sequences

• Number of lower triangles of an n X n 0..7 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less.at n=4A195247
• Number of lower triangles of a 5X5 0..n array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less.at n=6A195251