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A014949
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Numbers n such that n divides 8^n - 1.
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9
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1, 7, 49, 343, 889, 2359, 2401, 6223, 16513, 16807, 43561, 112903, 115591, 117649, 299593, 304927, 790321, 794983, 809137, 823543, 2033143, 2097151, 2134489, 5532247, 5564881, 5663959, 5764801, 13549249, 14232001, 14338681, 14680057
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OFFSET
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1,2
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COMMENTS
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For all k 7^k is in the sequence. - Benoit Cloitre, Mar 05 2002
Contribution from Alexander Adamchuk, May 16 2010: (Start)
7 divides a(n) for n>1.
Prime divisors of a (n) in the order of their first appearance are {7, 127, 337, 2287, 15241, 14407, 18199, 42463, ...}. (End)
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LINKS
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Table of n, a(n) for n=1..31.
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CROSSREFS
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Sequence in context: A216129 A057266 A057833 * A057845 A045584 A216130
Adjacent sequences: A014946 A014947 A014948 * A014950 A014951 A014952
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KEYWORD
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nonn
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AUTHOR
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Olivier Gérard
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EXTENSIONS
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More terms from Benoit Cloitre, Mar 05 2002
a(15)-a(46) from Alexander Adamchuk, May 16 2010
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STATUS
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approved
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