248501

Appears in sequences

• Denominators of continued fraction convergents to sqrt(620).at n=9A042191
• Numbers k such that 3*phi(k) = 2*sigma(k).at n=7A065818
• Numbers k such that phi(k) = sigma(k+1) - sigma(k).at n=8A066152
• Odd decagonal pyramidal numbers.at n=28A218330
• Numbers k such that gcd(sigma(k), phi(k)) (A009223) attains record values.at n=36A222711