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Search: id:A074716
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| A074716 |
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Numbers n such that 2^n-F(n) is prime, where F(n) is the n-th Fibonacci number. |
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2
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| 2, 4, 14, 23, 55, 80, 104, 286, 335, 383, 809, 1664, 2096, 2624, 4262, 13544, 14249, 19886, 35500, 40591
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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1664 and above are psudeoprimes only. - Sam Handler (sam_5_5_5_0(AT)yahoo.com), Dec 26 2004
1664, 2096, 2624, and 4262 correspond to certified primes. (Primo 2.2.0 beta) - Ryan Propper (rpropper(AT)stanford.edu), Aug 29 2005
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MATHEMATICA
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Do[ If[ PrimeQ[ 2^n - Fibonacci[n]], Print[n]], {n, 1, 5000}]
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CROSSREFS
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Cf. A074824.
Sequence in context: A127596 A111871 A090808 this_sequence A090889 A096012 A102930
Adjacent sequences: A074713 A074714 A074715 this_sequence A074717 A074718 A074719
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KEYWORD
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more,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Sep 04 2002
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EXTENSIONS
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Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 06 2002
5 more terms from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Dec 18 2004
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