Odd numbers k such that tau(k-1) is a prime.
A278741
Odd numbers k such that tau(k-1) is a prime.
Terms
- a(0) =3a(1) =5a(2) =17a(3) =65a(4) =1025a(5) =4097a(6) =65537a(7) =262145a(8) =4194305a(9) =268435457a(10) =1073741825a(11) =68719476737
External references
- oeis: A278741