641376

Appears in sequences

• Numbers k such that k and k^2 use only the digits 1, 3, 4, 6 and 7.at n=22A137025
• Number of lower triangles of an n X n 0..3 array with each element differing from all of its horizontal and vertical neighbors by one.at n=6A194993
• T(n,k)=Number of lower triangles of an n X n 0..k array with each element differing from all of its horizontal and vertical neighbors by one.at n=42A194998
• Number of lower triangles of a 7 X 7 0..n array with each element differing from all of its horizontal and vertical neighbors by one.at n=2A195003
• Number of n X 2 binary arrays with every one adjacent to another one horizontally, diagonally, antidiagonally or vertically.at n=9A202789