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Search: id:A143912
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| A143912 |
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Primes of the form : 2*p+1=p1(prime), 2*p1+3=p2(prime), 2*p2+5=p3(prime). |
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+0
1
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| 2, 23, 113, 191, 233, 443, 593, 1031, 1409, 2129, 2399, 2543, 4349, 4481, 4919, 5231, 5399, 6263, 6329, 6449, 7541, 10253, 10613, 11321, 12101, 13463, 13553, 13763, 14009, 15773, 15923, 17333, 17939, 18233, 18341, 18461, 18803, 19559, 19661
(list; graph; listen)
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OFFSET
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2,1
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COMMENT
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Subset of A005384. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 05 2008]
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EXAMPLE
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(prime)2*2+1=5(prime), 2*5+3=13(prime), 2*13+5=31(prime).
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MATHEMATICA
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lst={}; Do[p=Prime[n]; If[PrimeQ[p1=2*p+1]&&PrimeQ[p2=2*p1+3]&&PrimeQ[p3=2*p2+5], AppendTo[lst, p]], {n, 10^4}]; lst
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CROSSREFS
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Sequence in context: A073175 A141888 A034523 this_sequence A041579 A053299 A130547
Adjacent sequences: A143909 A143910 A143911 this_sequence A143913 A143914 A143915
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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), Sep 04 2008
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