Mersenne numbers: 2^p - 1, where p is prime.

A001348

Mersenne numbers: 2^p - 1, where p is prime.

Terms

    a(0) =3a(1) =7a(2) =31a(3) =127a(4) =2047a(5) =8191a(6) =131071a(7) =524287a(8) =8388607a(9) =536870911a(10) =2147483647a(11) =137438953471

External references