a(n) is the least k such that tau(k) divides sigma_n(k) but not sigma(k), or -1 if no such k exists.
A361683
a(n) is the least k such that tau(k) divides sigma_n(k) but not sigma(k), or -1 if no such k exists.
Terms
- a(0) =4a(1) =64a(2) =4a(3) =7168a(4) =4a(5) =606528a(6) =4a(7) =64a(8) =4a(9) =4194304a(10) =4
External references
- oeis: A361683