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A046847
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Numbers k such that k*2^k - (k-1) is prime.
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2
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1, 2, 4, 6, 30, 32, 42, 120, 210, 248, 284, 574, 600, 628, 1600, 2800, 3396, 8892, 9426, 14630, 15444, 37384, 51062
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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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MAPLE
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select(t -> isprime(t*2^t - (t-1)), [$1..5000]); # Robert Israel, Sep 22 2014
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PROG
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CROSSREFS
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KEYWORD
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nonn,hard,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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