Mersenne primes (primes of the form 2^n - 1).

A000668

Mersenne primes (primes of the form 2^n - 1).

Terms

    a(0) =3a(1) =7a(2) =31a(3) =127a(4) =8191a(5) =131071a(6) =524287a(7) =2147483647

External references