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Search: id:A158723
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| 13, 31, 73, 103, 181, 193, 433, 463, 571, 643, 661, 823, 1021, 1291, 1621, 1723, 2083, 2143, 2341, 2593, 2713, 3001, 3253, 3331, 3361, 3541, 4231, 4243, 4423, 4933, 5233, 5653, 5881, 6553, 6571, 6781, 6871, 6961, 7951, 8293, 9283, 9343, 9433, 9631, 9931
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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If prime number from seq. A158720 is twin prime, it always (?) Greater of twin primes, and none (?) of Lesser of twin primes.
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MATHEMATICA
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lst={}; Do[p=Prime[n]; If[PrimeQ[Floor[p/3]+p], If[PrimeQ[p-2], AppendTo[lst, p]]], {n, 7!}]; lst
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CROSSREFS
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Cf. A158708, A158709, A158710, A158711, A158712, A158713, A158714, A158719, A158720, A158721, A158722
Sequence in context: A021007 A061239 A072023 this_sequence A107288 A095379 A160772
Adjacent sequences: A158720 A158721 A158722 this_sequence A158724 A158725 A158726
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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), Mar 24 2009
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