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Search: id:A126107
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| A126107 |
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Primes p such that 2p+1 and 2p+3 are twin primes. |
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1
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| 2, 5, 29, 53, 89, 113, 173, 509, 659, 743, 809, 1013, 1499, 1559, 1583, 1733, 2063, 2129, 2273, 2393, 2399, 2549, 2819, 2939, 3329, 3389, 3413, 3779, 4409, 5003, 5849, 6053, 6269, 7193, 7433, 7643, 7823, 8069, 8093, 8513, 8693, 9029, 9059, 9539, 9689
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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a(2)=5 because 2*5+1=11 and 2*5+3=13 are twin primes.
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MATHEMATICA
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Do[p = Prime[ i]; If[PrimeQ[2p + 1] && PrimeQ[2p + 3], Print[p]], {i, 1, 10000}] - Michael Taktikos (michael.taktikos(AT)hanse.net), Apr 01 2007
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CROSSREFS
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Cf. A128436 = primes p such that 2p-3 and 2p-1 are twin primes.
Sequence in context: A134449 A103579 A061351 this_sequence A083472 A057794 A073715
Adjacent sequences: A126104 A126105 A126106 this_sequence A126108 A126109 A126110
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)gmail.com), Mar 05 2007
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