229321

Properties

Appears in sequences

• Numbers k such that 1/(1/phi(k) + 1/phi(k+1) + 1/phi(k+2) + 1/phi(k+3)) is an integer.at n=23A073544
• Numbers in A137365 but not in A137366.at n=25A138556
• Primes p such that (p+1)/2, (p+2)/3 and (p+3)/4 are also primes.at n=7A163573
• Primes of the form 7n^2 - 6.at n=19A201852
• Primes of the form 2520k + 1 for some k.at n=33A217588
• Prime numbersat n=20376