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A174915
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Numbers p such that p, q=p+2 and p+2*q are all primes.
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8
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3, 5, 11, 41, 59, 101, 179, 191, 269, 311, 431, 521, 599, 821, 881, 1019, 1061, 1151, 1229, 1301, 1451, 1481, 1619, 1721, 1949, 2081, 2111, 2141, 2729, 2999, 3299, 3821, 4001, 4091, 4259, 4421, 4799, 4931, 5009, 5519, 5639, 5849, 6131, 6359, 6689, 6701
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OFFSET
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1,1
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COMMENTS
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Subsequence of A175914.
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LINKS
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Zak Seidov, Table of n, a(n) for n = 1..1000
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MATHEMATICA
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lst={}; Do[p1=Prime[n]; p2=p1+2; If[PrimeQ[p2]&&PrimeQ[p1+2*p2], AppendTo[lst, p1]], {n, 7!}]; lst
Reap[Do[p = Prime[m]; If[PrimeQ[p + 2 ] && PrimeQ[3 p + 4], Sow[p]], {m, 10^3}]][[2, 1]](* Zak Seidov, Oct 14 2012 *)
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PROG
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(PARI) forprime(p=2, 7000, q=p+2; if(isprime(q)&& isprime(p+2*q), print1(p, ", ")))
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CROSSREFS
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Cf. A001359, A174913, A175914.
Sequence in context: A082856 A060881 A035345 * A162250 A055511 A105236
Adjacent sequences: A174912 A174913 A174914 * A174916 A174917 A174918
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KEYWORD
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nonn
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AUTHOR
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Vladimir Joseph Stephan Orlovsky, Apr 02 2010
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EXTENSIONS
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Definition and comment corrected by Zak Seidov, Dec 06 2010
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STATUS
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approved
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