A050527 Primes of form 7*2^n+1.

29, 113, 449, 114689, 7340033, 469762049, 7881299347898369, 31525197391593473, 34662321099990647697175478273, 9304595970494411110326649421962412033, 167616699782206593882944206094565066958299591488831489

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime

Crossrefs

For more terms see A032353.

Sequence in context: A158556 A272629 A201602 * A254413 A225928 A097461

Adjacent sequences: A050524 A050525 A050526 * A050528 A050529 A050530

Keyword

nonn

Author

N. J. A. Sloane, Dec 29 1999

Status

approved