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Search: id:A051915
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| A051915 |
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Numbers n such that 2*n! + 1 is a prime. |
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+0
9
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| 0, 1, 2, 3, 5, 12, 18, 35, 51, 53, 78, 209, 396, 4166
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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Used PrimeForm to prove primality for n = 4166 (classical N-1 test) - David Radcliffe (radcl008(AT)umn.edu), May 28 2007
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EXAMPLE
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n=5 is here because 2*5!+1=241 is a prime.
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CROSSREFS
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Cf. A051888.
Adjacent sequences: A051912 A051913 A051914 this_sequence A051916 A051917 A051918
Sequence in context: A127814 A112978 A002139 this_sequence A064688 A089891 A004689
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Dec 18 1999
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EXTENSIONS
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4166 from David Radcliffe (radcl008(AT)umn.edu), May 28 2007
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