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Search: id:A153041
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| A153041 |
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Numbers n such that 2*n-19 is not a prime |
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+0
4
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| 14, 17, 20, 22, 23, 26, 27, 29, 32, 34, 35, 37, 38, 41, 42, 44, 47, 48, 50, 52, 53, 55, 56, 57, 59, 62, 65, 67, 68, 69, 70, 71, 72, 74, 76, 77, 80, 81, 82, 83, 86, 87, 89, 90, 92, 94, 95, 97, 98, 101, 102, 103, 104
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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Let p = prime number n = (p^2+19)/2 mod (p)
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EXAMPLE
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14; 17, 22: 20, 27, 34; 23, 32, 41, 50; 26, 37, 48, 59, 70; 29, 42, 55, 68, 81, 94.
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CROSSREFS
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Cf. A097932
Sequence in context: A067844 A015877 A152010 this_sequence A046085 A054296 A155704
Adjacent sequences: A153038 A153039 A153040 this_sequence A153042 A153043 A153044
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KEYWORD
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nonn
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AUTHOR
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Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 17 2008
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