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A112880
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The factors k(n) such that the twin-prime subsequence A112879 is obtained.
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2
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OFFSET
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1,1
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LINKS
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EXAMPLE
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12*3^2-1=107, 107 and 109 twin primes so k(1)=12
18*107^2-1=206081, 206081 and 206083 twin primes so k(2)=18
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CROSSREFS
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KEYWORD
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hard,nonn
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AUTHOR
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EXTENSIONS
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Removed misleading mention of a(n) in NAME. - R. J. Mathar, Jun 20 2021
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STATUS
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approved
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