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Search: id:A003424
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| A003424 |
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Primes of form (p^x - 1)/(p^y - 1), p prime.
(Formerly M2417)
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+0
3
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| 3, 5, 7, 13, 17, 31, 73, 127, 257, 307, 757, 1093, 1723, 2801, 3541, 5113, 8011, 8191, 10303, 17293, 19531, 28057, 30103, 30941, 65537, 86143, 88741, 131071, 147073
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
Bateman, Paul T.; Stemmler, Rosemarie M.; Waring's problem for algebraic number fields and primes of the form (p^r-1)/(p^d-1). Illinois J. Math. 6 1962 142-156.
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..4738
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CROSSREFS
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Cf. A059055, A085104
Sequence in context: A071111 A038929 A070806 this_sequence A073638 A066464 A062324
Adjacent sequences: A003421 A003422 A003423 this_sequence A003425 A003426 A003427
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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