1,2

845494 is also in the sequence. - Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008

Table of n, a(n) for n=1..35.

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.

Sequence in context: A141640 A015898 A231504 * A022099 A042113 A041166

Adjacent sequences: A050548 A050549 A050550 * A050552 A050553 A050554

hard,nonn

N. J. A. Sloane, Dec 29 1999

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008

approved