Primes of the form (p^x - 1)/(p^y - 1), where p is prime, y > 1, and y is the largest proper divisor of x.
A187823
Primes of the form (p^x - 1)/(p^y - 1), where p is prime, y > 1, and y is the largest proper divisor of x.
Terms
- a(0) =5a(1) =17a(2) =73a(3) =257a(4) =757a(5) =65537a(6) =262657a(7) =1772893
External references
- oeis: A187823