a(n) is the smallest prime q such that 2*q^k - 1 is prime for k = 1, 2, ..., n.
A229627
a(n) is the smallest prime q such that 2*q^k - 1 is prime for k = 1, 2, ..., n.
Terms
- a(0) =2a(1) =2a(2) =3a(3) =92581a(4) =385939a(5) =464938699a(6) =24137752519
External references
- oeis: A229627