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Search: id:A087681
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| A087681 |
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n +/- 6 are both prime. |
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+0
6
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| 11, 13, 17, 23, 25, 35, 37, 47, 53, 65, 67, 73, 77, 95, 103, 107, 133, 143, 145, 157, 173, 185, 187, 205, 217, 233, 235, 245, 257, 263, 275, 277, 287, 343, 353, 373, 395, 403, 415, 425, 427, 437, 455, 473, 485, 493, 497, 515, 563, 593, 607, 613, 625, 637, 647
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Many terms are of the form 5+n^2+n or 5+2*n^2: A054794
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MATHEMATICA
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f[n_]:=PrimeQ[n-6]&&PrimeQ[n+6]; lst={}; Do[If[f[n], AppendTo[lst, n]], {n, 2, 7!, 1}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Aug 12 2009]
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CROSSREFS
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Cf. A054794.
Cf. A014574, A087678-A087683, A087695-A087697, A088766.
Sequence in context: A036979 A036977 A120168 this_sequence A137669 A152470 A078861
Adjacent sequences: A087678 A087679 A087680 this_sequence A087682 A087683 A087684
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KEYWORD
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easy,nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Sep 27 2003
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