Sophie Germain primes for which the product of the digits is also a Sophie Germain prime.
A118505
Sophie Germain primes for which the product of the digits is also a Sophie Germain prime.
Terms
- a(0) =2a(1) =3a(2) =5a(3) =113a(4) =131a(5) =1511a(6) =111111113a(7) =1111111121
External references
- oeis: A118505