1,1
Table of n, a(n) for n=1..5.
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
Kosmaj, Riesel list k<300.
(PARI) is(n)=ispseudoprime(127*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
Sequence in context: A044276 A044657 A160437 * A340123 A247683 A020152
Adjacent sequences: A050586 A050587 A050588 * A050590 A050591 A050592
hard,nonn
N. J. A. Sloane, Dec 29 1999
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
approved