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A217493
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Numbers k such that 9^k - 10 is prime.
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1
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2, 3, 4, 9, 11, 18, 19, 27, 28, 46, 50, 53, 80, 155, 203, 280, 451, 4963, 6167, 9687, 10083, 31450
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OFFSET
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1,1
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COMMENTS
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Contains exactly the halved even terms of A217347.
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LINKS
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MATHEMATICA
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Select[Range[5000], PrimeQ[9^# - 10] &]
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PROG
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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