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A084958
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Initial prime of a prime chain of length n under the iteration x->5x+2.
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6
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OFFSET
| 1,1
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COMMENTS
| This is a special case of prime chains generated by f(x) = cx + d.
a(11) > 8695354111. [From Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 27 2008]
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REFERENCES
| D. H. Lehmer, On certain chains of primes, Proc. London Math. Soc. (3) 14a 1965 183-186.
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EXAMPLE
| a(3)=13 since 13, f(13) =67 and f(67) = 337 are primes when f(x) = 5x+2
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CROSSREFS
| Cf. A057330, A057331, A083388, A084954, A084955, A084956, A084957, A084959, A084960, A084961.
Sequence in context: A193507 A103087 A135118 * A037392 A136341 A139563
Adjacent sequences: A084955 A084956 A084957 * A084959 A084960 A084961
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KEYWORD
| more,nonn
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AUTHOR
| W. Edwin Clark (eclark(AT)math.usf.edu), Jun 14 2003
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EXTENSIONS
| a(10) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 27 2008
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