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A128459
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Numbers n such that 17^n - 2 is a prime.
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13
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6, 24, 30, 106, 184, 232, 460, 1258, 3480, 5458, 32886
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OFFSET
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1,1
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COMMENTS
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No more terms through 50000. - Ryan Propper, Dec 06 2008
a(12) > 2*10^5. - Robert Price, Oct 23 2014
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LINKS
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Table of n, a(n) for n=1..11.
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MATHEMATICA
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Do[ f = 17^n - 2; If[ PrimeQ[ f ], Print[ {n, f} ] ], {n, 1, 1000} ]
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CROSSREFS
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Cf. A084714 = smallest prime of the form (2n-1)^k - 2, or 0 if no such number exists. Cf. A128472 = smallest prime of the form (2n-1)^k - 2 for k>(2n-1), or 0 if no such number exists. Cf. A014224, A109080, A090669, A128455, A128457, A128458, A128460, A128461.
Sequence in context: A209452 A275302 A201596 * A229292 A147826 A247271
Adjacent sequences: A128456 A128457 A128458 * A128460 A128461 A128462
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KEYWORD
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hard,more,nonn
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AUTHOR
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Alexander Adamchuk, Mar 14 2007
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EXTENSIONS
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2 more terms from Stefan Steinerberger, May 05 2007
Two more terms from Ryan Propper, Jan 16 2008
One more term from Ryan Propper, Dec 06 2008
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STATUS
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approved
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