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A112853
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Numbers n such that (2*n)!/n!-1 is prime.
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5
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2, 6, 14, 25, 114, 188, 193, 361, 712, 1767, 3195, 4995, 5682, 6485
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OFFSET
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1,1
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COMMENTS
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Next term is > 9680.
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LINKS
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CROSSREFS
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Cf. A112854 primes of the form (2*n)!/n!-1, A112855 (2*n)!/n!+1 is prime, A066726 (2*n)!/(n!)^2-1 is prime, A112859 (2*n)!/(n!)^2+1 is prime, A112861 (2*n)!/(2*(n!)^2)-1 is prime, A112863 (2*n)!/(2*(n!)^2)+1 is prime.
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KEYWORD
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hard,nonn
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AUTHOR
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STATUS
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approved
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