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Search: id:A137724
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| A137724 |
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Prime numbers p such that p +- ((p-1)/6) are primes. |
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+0
1
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| 37, 181, 397, 757, 829, 1657, 2089, 2161, 2341, 3061, 5077, 6337, 7057, 7309, 7561, 8389
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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37+-6=primes
181+-30=primes
397+-(396/6)=primes
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MATHEMATICA
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w=6; s=""; For[i=1, i<10^3*2, p=Prime[i]; If[PrimeQ[p-((p-1)/w)]&&PrimeQ[p+((p-1)/w)], (*Print[p, ":", p-((p-1)/w), ", ", p+((p-1)/w)]; *)s=s<>ToString[p]<>", "]; i++ ]; Print[s]
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CROSSREFS
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Sequence in context: A134219 A140593 A142410 this_sequence A142181 A107196 A140027
Adjacent sequences: A137721 A137722 A137723 this_sequence A137725 A137726 A137727
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 27 2008
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