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A362011
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Numbers k such that 1 < gcd(k, 70) < k and A007947(k) does not divide 70.
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1
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6, 12, 15, 18, 21, 22, 24, 26, 30, 34, 36, 38, 42, 44, 45, 46, 48, 52, 54, 55, 58, 60, 62, 63, 65, 66, 68, 72, 74, 75, 76, 77, 78, 82, 84, 85, 86, 88, 90, 91, 92, 94, 95, 96, 102, 104, 105, 106, 108, 110, 114, 115, 116, 118, 119, 120, 122, 124, 126, 130, 132, 133, 134, 135, 136, 138, 142, 144, 145, 146
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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 23/35. - Amiram Eldar, Dec 02 2023
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LINKS
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Michael De Vlieger, Diagram showing numbers k in this sequence instead as k mod 70 arranged in rows, labeled and in large black circles, else gray dots if coprime to 70, purple if k = 1, red if k | 70, and gold if rad(k) | 70.
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FORMULA
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MATHEMATICA
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With[{n = 70}, 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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