Least k such that sigma(k*n) = sigma(k*n-1), or 0 if no such k exists.
A275411
Least k such that sigma(k*n) = sigma(k*n-1), or 0 if no such k exists.
Terms
- a(0) =15a(1) =479a(2) =5a(3) =155257a(4) =3
External references
- oeis: A275411
A275411
Least k such that sigma(k*n) = sigma(k*n-1), or 0 if no such k exists.