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Search: id:A084957
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| A084957 |
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Initial prime of a prime chain of length n under the iteration x->4x+3. |
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+0
7
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| 2, 2, 2, 2, 1447, 9769, 17231, 17231, 32611, 18527009
(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.
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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) =11 and f(11) = 47 are primes when f(x) = 4x+3
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CROSSREFS
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Cf. A057330, A057331, A083388, A084954, A084955, A084956, A084958, A084959, A084960, A084961.
Sequence in context: A075182 A084954 A049300 this_sequence A035307 A004481 A004489
Adjacent sequences: A084954 A084955 A084956 this_sequence A084958 A084959 A084960
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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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