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1,1
Table of n, a(n) for n=1..19.
Ray Ballinger, Proth Search Page
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: A164564 A211329 A104298 * A169728 A167054 A241680
Adjacent sequences: A032472 A032473 A032474 * A032476 A032477 A032478
nonn,hard
N. J. A. Sloane.
approved