50209

Appears in sequences

• Numbers having four 7's in base 9.at n=12A043484
• Integers p*q*r such that p*q and q*r are both golden semiprimes (A108540). Integers p*q*r such that p = A108541(j), q = A108542(j) = A108541(k) and r = A108542(k).at n=2A107768