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Search: id:A153051
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| A153051 |
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Numbers n such that 2*n-17 is not a prime |
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+0
3
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| 13, 16, 19, 21, 22, 25, 26, 28, 31, 33, 34, 36, 37, 40, 41, 43, 46, 47, 49, 51, 52, 54, 55, 56, 58, 61, 64, 66, 67, 68, 69, 70, 71, 73, 75, 76, 79, 80, 81, 82, 85, 86, 88, 89, 91, 93, 94, 96, 97, 100, 101, 102, 103, 106, 109, 110, 111, 112, 113, 115, 116, 117, 118, 119
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Adding 1 to each entry yields A153041. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 19 2008]
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FORMULA
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Let p = prime number n = (p^2+17)/2 mod (p)
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EXAMPLE
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13; 16, 21; 19, 26, 33; 22, 31, 40, 49; 25, 36, 47, 58, 69; 28, 41, 54, 67, 80, 93;
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CROSSREFS
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A098605
Sequence in context: A109018 A158697 A058225 this_sequence A064805 A159975 A110623
Adjacent sequences: A153048 A153049 A153050 this_sequence A153052 A153053 A153054
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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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EXTENSIONS
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57 removed by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 19 2008
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