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Search: id:A083371
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| A083371 |
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Primes satisfying f(2p)=p when f(1)=7 (see comment). |
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2
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| 89, 113, 139, 181, 199, 211, 241, 283, 293, 317, 337, 359, 389, 401, 409, 421, 449, 467, 479, 491
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Conjecture: start from any initial value f(1)>=2 and define f(n) as the largest prime factor of f(1)+f(2)+...+f(n-1) then f(n)=n/2+O(log(n)) and there are infinitely primes p such that f(2p)=p.
Is this the same sequence as A124583? If so the entries should be merged. - njas, Oct 21 2007
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CROSSREFS
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Cf. A076973.
Adjacent sequences: A083368 A083369 A083370 this_sequence A083372 A083373 A083374
Sequence in context: A050956 A121608 A135144 this_sequence A124583 A132258 A109560
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KEYWORD
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nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 04 2003
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