Numbers k such that k' = sigma(k), where k' is the arithmetic derivative of k.
A230164
Numbers k such that k' = sigma(k), where k' is the arithmetic derivative of k.
Terms
- a(0) =17296a(1) =24016a(2) =334144656a(3) =358585488a(4) =2955423888a(5) =311063879024
External references
- oeis: A230164