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Search: id:A112540
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| A112540 |
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Numbers n such that (15n-4; 15n-2; 15n+2; 15n+4) is a prime quadruplet. |
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+0
1
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| 1, 7, 13, 55, 99, 125, 139, 217, 231, 377, 629, 867, 1043, 1049, 1071, 1203, 1261, 1295, 1401, 1485, 1687, 2115, 2323, 2919, 3423, 3689, 4199, 4481, 4633, 4815, 5151, 5313, 5403, 5515, 5921, 6523, 6609
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OFFSET
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1,2
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FORMULA
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Numbers n such that 15n-4, 15n-2, 15n+2 and 15n+4 together are prime numbers.
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EXAMPLE
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n=7 => 15*7-4 = 101, 15*7-2 = 103, 15*7+2 = 107, 15*7+4 = 109
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MATHEMATICA
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Select[Range[6610], PrimeQ[15#-4] && PrimeQ[15#-2] && PrimeQ[15#+2] && PrimeQ[15#+4]&] - T. D. Noe (noe(AT)sspectra.com), Nov 16 2006
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CROSSREFS
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Sequence in context: A116522 A108056 A018562 this_sequence A015441 A091005 A133664
Adjacent sequences: A112537 A112538 A112539 this_sequence A112541 A112542 A112543
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KEYWORD
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nonn
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AUTHOR
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Karsten Meyer (arbol01(AT)gmx.de), Dec 16 2005
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EXTENSIONS
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Corrected by T. D. Noe (noe(AT)sspectra.com), Nov 16 2006
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