567644

Appears in sequences

• Numbers n such that n and n+1 have 5 distinct prime factors.at n=16A140079
• Numbers n such that phi(n)*sigma(n) = phi(n+1)*sigma(n+1).at n=16A244439
• Number of self-conjugate solutions of X + Y = 2Z (integer, disjoint triples from {1,2,3,...,3n}).at n=15A282616
• Numbers k such that k and k+1 each have at least 5 distinct prime factors.at n=16A321505