Number of lower triangles of an n X n integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by 3 or less and triangles differing by a constant counted only once.

A195215

Number of lower triangles of an n X n integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by 3 or less and triangles differing by a constant counted only once.