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A050527
Primes of form 7*2^n+1.
28
29, 113, 449, 114689, 7340033, 469762049, 7881299347898369, 31525197391593473, 34662321099990647697175478273, 9304595970494411110326649421962412033, 167616699782206593882944206094565066958299591488831489
OFFSET
1,1
CROSSREFS
For more terms see A032353.
Sequence in context: A158556 A272629 A201602 * A254413 A225928 A097461
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 29 1999
STATUS
approved