221443

Appears in sequences

• Composite numbers which in base 6 contain their largest proper factor as a substring.at n=21A063156
• Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,6,0,0,0,0,1 for x=0,1,2,3,4,5,6.at n=5A197786