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Search: id:A153044
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| A153044 |
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Numbers n such that 2*n-9 is not a prime |
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+0
2
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| 9, 12, 15, 17, 18, 21, 22, 24, 27, 29, 30, 32, 33, 36, 37, 39, 42, 43, 45, 47, 48, 50, 51, 52, 54, 57, 60, 62, 63, 64, 65, 66, 67, 69, 71, 72, 75, 76, 77, 78, 81, 82, 84, 85, 87, 89, 90, 92, 93, 96, 97, 98, 99, 102
(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+9)/2 mod (p)
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EXAMPLE
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9; 12, 17; 15, 22, 29; 18, 27, 36, 45; 21, 32, 43, 54, 65; 24, 37, 50, 63, 76, 89:
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CROSSREFS
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A097069
Sequence in context: A009188 A138299 A050435 this_sequence A138945 A119486 A161345
Adjacent sequences: A153041 A153042 A153043 this_sequence A153045 A153046 A153047
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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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