870871

Properties

Appears in sequences

• a(n) = 1 - (7/6)*n + (2/3)*n^3 + (1/2)*n^4.at n=36A046998
• Primes of the form 30030*p + 1 where p is a prime.at n=3A051651
• Smallest prime which is 1 more than a product of n distinct primes: a(n) is a prime and a(n) - 1 is a squarefree number with n prime factors.at n=7A073918
• Primes p at which phi(p-1)/(p-1) reaches a new minimum, where phi is Euler's totient function.at n=9A241196
• Numbers n such that phi(n)/phi(phi(n)) > phi(m)/phi(phi(m)) for all m < n.at n=8A289125
• 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=37A293712
• Prime numbersat n=69162