Mersenne prime exponents (A000043) which are also Sophie Germain primes (A005384).

A065406

Mersenne prime exponents (A000043) which are also Sophie Germain primes (A005384).

Terms

    a(0) =2a(1) =3a(2) =5a(3) =89a(4) =9689a(5) =21701a(6) =859433a(7) =43112609

External references