1,2
Table of n, a(n) for n=1..9.
Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300
Wilfrid Keller, List of primes k.2^n - 1 for k < 300
Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime
Sequence in context: A136143 A035791 A162136 * A027572 A050239 A218690
Adjacent sequences: A053360 A053361 A053362 * A053364 A053365 A053366
hard,nonn
N. J. A. Sloane, Dec 29 1999
approved
