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A028882
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Numbers n such that n^2 - 7 is prime.
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3
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3, 6, 12, 18, 24, 36, 48, 54, 60, 66, 90, 96, 108, 132, 138, 156, 162, 174, 186, 192, 204, 216, 222, 228, 240, 246, 270, 306, 318, 330, 360, 366, 384, 390, 408, 438, 450, 468, 474, 480, 492, 498, 522, 570, 576, 582, 606, 612, 618, 624, 636, 642, 660, 678, 708
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| P. De Geest, Palindromic Quasipronics of the form n(n+x)
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MATHEMATICA
| f[n_]:=PrimeQ[n^2-7]; lst={}; Do[If[f[n], AppendTo[lst, n]], {n, 3, 7!, 1}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Aug 12 2009]
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PROG
| (MAGMA) [n: n in [3..1000] |IsPrime(n^2-7)] [From Vincenzo Librandi, Nov 18 2010]
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CROSSREFS
| Sequence in context: A079830 A160744 A160738 * A154907 A024513 A181026
Adjacent sequences: A028879 A028880 A028881 * A028883 A028884 A028885
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KEYWORD
| nonn
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com)
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