569160

Appears in sequences

• Numbers n such that sigma(n) = 15*phi(n) (where sigma=A000203, phi=A000010).at n=11A171260
• a(n) is the least x such that x-1 and x+1 are prime and there are exactly n primes of the form x-1+t or x+1+t where t divides x.at n=46A340170