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A067527
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n - 3^k is a prime for all k > 0 such that 3^k < n.
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4
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5, 6, 8, 14, 16, 20, 22, 26, 32, 40, 46, 50, 56, 70, 110, 140, 260, 470, 1190, 1330
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OFFSET
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1,1
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COMMENTS
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Is the sequence finite?
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LINKS
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EXAMPLE
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40 is a member as 40 - 3 = 37, 40 - 9 = 31, 40 - 27 = 13 are all primes.
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MATHEMATICA
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A067527 = {}; Do[k = 1; While[p = n - 3^k; p > 0 && PrimeQ[p], k++]; If[p <= 0, AppendTo[A067527, n]], {n, 4, 10000}]; A067527 (* T. D. Noe, Feb 20 2005 *)
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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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