42683

Properties

Appears in sequences

• a(n) is the least k > 0 such that sigma(k!) >= n*k!.at n=19A061556
• Smallest number m such that m#/phi(m#) >= n, where m# indicates the primorial (A034386) of m and phi is Euler's totient function.at n=18A091440
• a(n) = index of first appearance of n in A096862.at n=18A097008
• Let a(n) be the n-th term of the sequence. Let m = primorial(a(n)); m is the minimum positive integer such that m/phi(m) >= n.at n=18A167348
• Primes in A168472.at n=21A168473
• Numbers k such that 33*10^k + 7 is prime.at n=30A275285
• Number of positive solutions to (x_1)^2 + (x_2)^2 + ... + (x_6)^2 <= n^2.at n=7A341425
• Primes p such that p+6, p-6, 2*p+3 and 2*p-3 are prime.at n=30A356079
• Prime numbersat n=4461