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A249305
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Primes p such that 2^p - p^2 is not squarefree.
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0
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OFFSET
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1,1
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COMMENTS
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Sequence is infinite, containing all primes equal to 2, 4, 89, or 115 mod 147. - Charles R Greathouse IV, Oct 28 2014
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LINKS
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FORMULA
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EXAMPLE
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2 is in this sequence because 2 is prime and 2^2 - 2^2 = 0 is not squarefree.
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PROG
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(Magma) [n: n in [3..269] | IsPrime(n) and not IsSquarefree(2^n - n^2)];
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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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