176471

Appears in sequences

• 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 2 or less and triangles differing by a constant counted only once.at n=3A195214
• T(n,k) is the 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 k or less and triangles differing by a constant counted only once.at n=13A195220
• Number of lower triangles of a 4 X 4 integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by n or less and triangles differing by a constant counted only once.at n=1A195222
• Strong Lucas pseudoprimes.at n=21A217255
• Solutions of the equation k'' = tau(k) * k', where k' and k'' are the first and the second arithmetic derivative of k.at n=21A230544