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A084714
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a(n) = smallest prime of the form (2n-1)^k - 2, or 0 if no such number exists.
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16
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0, 7, 3, 5, 7, 14639, 11, 13, 24137567, 17, 19, 480250763996501976790165756943039, 23, 727, 839, 29, 31, 1223, 1367, 37, 2825759, 41, 43, 2207, 47, 45767944570399, 7890479, 53, 1176246293903439667999, 12117359, 59, 61, 318644812890623
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..33.
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MATHEMATICA
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f[n_] := Block[{k = 1}, While[ !PrimeQ[(2*n - 1)^k - 2], k++ ]; (2*n - 1)^k - 2]; Table[ f[n], {n, 2, 34}]
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CROSSREFS
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Cf. A084712, A084713.
Sequence in context: A135002 A319531 A175452 * A340820 A256779 A030760
Adjacent sequences: A084711 A084712 A084713 * A084715 A084716 A084717
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy, Jun 10 2003
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EXTENSIONS
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Edited, corrected and extended by Robert G. Wilson v, Jun 11 2003
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STATUS
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approved
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