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3, 4, 7, 13, 16, 28, 31, 37, 46, 52, 67, 76, 88, 97, 118, 133, 136, 181, 196, 202, 217, 226, 241, 247, 283, 286, 298, 301, 328, 343, 352, 361, 373, 382, 412, 457, 466, 493, 508, 517, 532, 556, 583, 598, 613, 616, 643, 646, 661, 688, 721, 727, 742, 763, 781, 787
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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f[n_]:=PrimeQ[n - 4] && PrimeQ[n + 4]; lst={}; Do[If[f[n], AppendTo[lst, (n - 1) / 2]], {n, 3, 7!, 2}]; lst (* Vincenzo Librandi, May 19 2017 *)
(#-1)/2&/@(Select[Prime[Range[250]], PrimeQ[#+8]&]+4) (* Harvey P. Dale, May 21 2023 *)
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PROG
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(Magma) [(n-1)/2: n in [2..2000] |IsPrime(n+4) and IsPrime(n-4)]; // Vincenzo Librandi, May 19 2017
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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