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A353765
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Numbers k for which A353749(k) is a multiple of A353749(sigma(k)), where A353749(k) = phi(k) * A064989(k), and A064989 shifts the prime factorization one step towards lower primes.
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3
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1, 3, 5, 15, 27, 459, 819, 2295, 13923, 69615, 361179, 3282147, 6140043, 16410735, 30700215, 99558459, 277788987, 497792295, 1388944935
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OFFSET
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1,2
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COMMENTS
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Question: Does every term need to be odd? Could there be any other non-multiples of 3 than a(1) and a(3)?
If it exists, a(20) > 2^32.
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LINKS
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CROSSREFS
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Conjectured to be a subsequence of A353758.
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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