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A135716
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Numbers n such that all numbers of the form p(n)#/p(k) +- 1, where 1 <= k <= n, are composite.
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2
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OFFSET
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1,1
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COMMENTS
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p(k) is k-th prime; p(n)# is n-th primorial, A002110(n). No more terms <= 500.
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LINKS
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FORMULA
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EXAMPLE
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119 is a term as p(119)#/p(k)+1 is composite for all 1 <= k <= 119 and p(119)#/p(k)-1 is likewise composite for the same k values; there are 238 such composite numbers.
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PROG
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(PARI)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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