660661

Properties

Appears in sequences

• Largest prime < 10*a(n-1), a(1)=7.at n=5A124291
• Numbers k such that psi(phi(k))/k > psi(phi(m))/m for all m < k, where phi is Euler's totient function (A000010) and psi is the Dedekind psi function (A001615).at n=35A293712
• Prime numbersat n=53621