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A015898
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Numbers k such that k | 9^k + 9.
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11
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1, 2, 3, 6, 9, 10, 18, 30, 90, 123, 730, 7086, 172426, 300243, 372390, 449674, 1812298, 5027914, 5307130, 17214354, 20788426, 84929451, 101992426, 102177370, 103544442, 106494770, 161388338, 181327546, 193710249, 207083626
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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Select[Range[10^5], Mod[PowerMod[9, #, #] + 9, #] == 0 &] (* Giovanni Resta, Oct 23 2018 *)
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CROSSREFS
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Cf. A006517, A015888, A015889, A015891, A015892, A015893, A015897, A015902, A015903, A015904, A015905, A015906.
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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