39077

Appears in sequences

• Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 24.at n=63A051965
• Numbers n such that n'' = n'+1 where n' and n'' are respectively the first and the second arithmetic derivative of n (A003415).at n=11A189639
• Numbers k for which sigma(k) = k + k'', where k'' is the second derivative of k (A068346).at n=12A348426