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A362010
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Numbers k such that 1 < gcd(k, 42) < k and A007947(k) does not divide 42.
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1
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10, 15, 20, 22, 26, 30, 33, 34, 35, 38, 39, 40, 44, 45, 46, 50, 51, 52, 57, 58, 60, 62, 66, 68, 69, 70, 74, 75, 76, 77, 78, 80, 82, 86, 87, 88, 90, 91, 92, 93, 94, 99, 100, 102, 104, 105, 106, 110, 111, 114, 116, 117, 118, 119, 120, 122, 123, 124, 129, 130, 132, 133, 134, 135, 136, 138, 140, 141, 142
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OFFSET
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1,1
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COMMENTS
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The asymptotic density of this sequence is 5/7. - Amiram Eldar, Dec 02 2023
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LINKS
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FORMULA
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MATHEMATICA
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With[{n = 42}, Select[Range[200], And[! CoprimeQ[#, n], ! Divisible[n, Times @@ FactorInteger[#][[All, 1]]]] & ] ]
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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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