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A220701
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Numbers k such that k^3 + 3*k + 3^k is prime.
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1
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1, 2, 4, 5, 7, 17, 22, 47, 155, 167, 203, 277, 469, 629, 890, 1427, 4507, 5705, 6095, 9808, 10108, 12797, 16184, 31535, 33575
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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[10000], PrimeQ[#^3 + 3*# + 3^#]&]
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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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