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Search: id:A104636
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| A104636 |
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Even n such that 2n+1 is prime. |
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+0
2
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| 2, 6, 8, 14, 18, 20, 26, 30, 36, 44, 48, 50, 54, 56, 68, 74, 78, 86, 90, 96, 98, 114, 116, 120, 128, 134, 138, 140, 146, 156, 158, 168, 174, 176, 186, 194, 198, 200, 204, 210, 216, 224, 228, 230, 254, 260, 270
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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lst={}; Do[p=2*n+1; If[PrimeQ[p], AppendTo[lst, n]], {n, 0, 10^3, 2}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 10 2008]
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CROSSREFS
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Cf. A005097, A104635.
Sequence in context: A165607 A109440 A063242 this_sequence A137831 A117588 A022112
Adjacent sequences: A104633 A104634 A104635 this_sequence A104637 A104638 A104639
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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), Mar 18 2005
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