195320

Appears in sequences

• Number of equilateral triangles formed out of matches that can be found in a hexagonal chunk of side length n in hexagonal array of matchsticks.at n=38A045949
• Numbers k such that k | (sigma(k) - d(k) - phi(k)) and k is not a prime or twice a prime.at n=4A055971
• Concatenation of (3n-2), (3n-1) and 3n divided by 3.at n=19A082252
• Numbers m such that if x = sigma(m)-phi(m)-tau(m)-m then m = sigma(x)-phi(x)-tau(x)-x.at n=5A238230