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Search: id:A127106
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| A127106 |
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Numbers n such that n^2 divides 6^n-1. |
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25
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OFFSET
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1,2
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COMMENT
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a(n) is a subset of A014946(n) = {1, 5, 25, 125, 625, 1555, 3125, 7775, 15625, ...} Numbers n such that n divides 6^n-1.
Next term, if it exists, is greater than 8*10^9. - Ryan Propper (rpropper(AT)stanford.edu), Jan 06 2007
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MATHEMATICA
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Select[Range[20000], IntegerQ[(PowerMod[6, #, #^2 ]-1)/#^2 ]&]
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CROSSREFS
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Cf. A127100, A127101, A127102, A127103, A123104, A127105, A127107, A127092. Cf. A014946 = numbers n such that n divides 6^n-1.
Sequence in context: A014377 A165628 A119747 this_sequence A165877 A123658 A057199
Adjacent sequences: A127103 A127104 A127105 this_sequence A127107 A127108 A127109
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KEYWORD
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hard,more,nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Jan 05 2007
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