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A139730
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a(n) = 9^n mod 5^n.
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1
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0, 4, 6, 104, 311, 2799, 191, 17344, 77971, 701739, 456276, 33403359, 202973981, 361922079, 815892461, 19550063399, 145432992466, 88193807194, 1556683717871, 10195456195214, 34538646772551, 120112957671709, 2034690935451631, 1622917881955304, 50369047802832111
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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Table[PowerMod[9, n, 5^n], {n, 0, 30}] (* Harvey P. Dale, Jul 17 2021 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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