558830

Appears in sequences

• Numbers n such that n and n+1 have 5 distinct prime factors.at n=15A140079
• Composite squarefree numbers n such that p-tau(n) divides n+phi(n), where p are the prime factors of n, tau(n) = A000005(n) and phi(n) = A000010(n).at n=19A229321
• Numbers k such that both k and k+1 are the product of exactly five distinct primes.at n=10A318964
• Numbers k such that k and k+1 each have at least 5 distinct prime factors.at n=15A321505