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Search: id:A124414
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| A124414 |
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Numbers n such that 2n+1, 4n+1, 8n+1, 16n+1, 32n+1 and 64n+1 are primes. |
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1
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| 8325, 16650, 82950, 165900, 192795, 222870, 239400, 290235, 601560, 884220, 971685, 1020600, 1065570, 1120470, 1170330, 1196715, 1263360, 1638735, 1768440, 1811940, 1940190, 1948815, 2061810, 2207685, 2240940, 2639295, 2830905
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OFFSET
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1,1
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MATHEMATICA
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Select[15*Range[200000], And @@ PrimeQ /@ ({2, 4, 8, 16, 32, 64}*# + 1) &] (*Chandler*)
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CROSSREFS
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Cf. A005097, A123998, A124041, A124412-A124417.
Adjacent sequences: A124411 A124412 A124413 this_sequence A124415 A124416 A124417
Sequence in context: A031589 A031769 A062852 this_sequence A124415 A031947 A049357
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Nov 02 2006
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