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A057909
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Numbers k such that 4^k + k is prime.
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1
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1, 3, 9, 15, 37, 85, 133, 225, 1233, 12793, 108889
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OFFSET
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1,2
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COMMENTS
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LINKS
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MATHEMATICA
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Do[ If[ PrimeQ[ 4^n + n ], Print[ n ] ], {n, 0, 3000} ]
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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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