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Search: id:A084961
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| A084961 |
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Initial prime of a prime chain of length n under the iteration x->6x+5. |
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+0
7
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| 2, 2, 2, 2, 11, 13, 115571, 23586221, 53165771, 3398453717
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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This is a special case of prime chains generated by f(x) = cx + d.
a(11) > 10175130529. [From Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 27 2008]
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REFERENCES
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D. H. Lehmer, On certain chains of primes, Proc. London Math. Soc. (3) 14a 1965 183-186.
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EXAMPLE
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a(3)=2 since 2, f(2) =17 and f(17) =107 are primes when f(x) = 6x+5
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CROSSREFS
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Cf. A057330, A057331, A083388, A084954, A084955, A084956, A084957, A084958, A084959, A084960.
Sequence in context: A112727 A164918 A147822 this_sequence A029643 A100687 A067096
Adjacent sequences: A084958 A084959 A084960 this_sequence A084962 A084963 A084964
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KEYWORD
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more,nonn
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AUTHOR
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W. Edwin Clark (eclark(AT)math.usf.edu), Jun 14 2003
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EXTENSIONS
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a(8)-a(10) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 27 2008
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