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A252802
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Primes whose trajectory under the map x -> A039951(x) enters the cycle {3, 11, 71}.
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7
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OFFSET
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1,1
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COMMENTS
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Further terms in the sequence are 71, 107, 127, 139, 167, 179, etc. The smallest prime where it is unknown whether it is in this sequence (or in A252801 or A252812) is 47.
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LINKS
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EXAMPLE
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The trajectory of 19 under the given map starts 19, 3, 11, 71, 3, ..., entering the given cycle, so 19 is a term of the sequence.
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CROSSREFS
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KEYWORD
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nonn,hard,more,bref
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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