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 A174915 Numbers p such that p, q=p+2 and p+2*q are all primes. 8
 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Subsequence of A175914. LINKS Zak Seidov, Table of n, a(n) for n = 1..1000 MATHEMATICA 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 *) PROG (PARI) forprime(p=2, 7000, q=p+2; if(isprime(q)&& isprime(p+2*q), print1(p, ", "))) CROSSREFS Cf. A001359, A174913, A175914. Sequence in context: A082856 A060881 A035345 * A162250 A055511 A105236 Adjacent sequences:  A174912 A174913 A174914 * A174916 A174917 A174918 KEYWORD nonn AUTHOR Vladimir Joseph Stephan Orlovsky, Apr 02 2010 EXTENSIONS Definition and comment corrected by Zak Seidov, Dec 06 2010 STATUS approved

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