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A192819
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Numbers which are both abundant (A005101) and anti-abundant (A192268).
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1
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12, 18, 20, 30, 40, 42, 48, 60, 66, 70, 72, 78, 80, 84, 88, 90, 100, 102, 104, 108, 112, 120, 126, 132, 138, 140, 144, 150, 160, 162, 168, 176, 180, 186, 192, 196, 198, 200, 204, 208, 210, 220, 222, 228, 234, 240, 252, 258, 260, 264, 270, 272, 276, 280, 282, 288
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OFFSET
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1,1
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COMMENTS
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This is to abundant numbers as A192818 is to deficient numbers.
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LINKS
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FORMULA
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MATHEMATICA
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q[n_] := Total[Cases[Range[2, n - 1], _?(Abs[Mod[n, #] - #/2] < 1 &)]] > n && DivisorSigma[1, n] > 2*n; Select[Range[300], q] (* Amiram Eldar, Jan 13 2022 after Michael De Vlieger at A066417 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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Missing term a(4) inserted and more terms added by Amiram Eldar, Jan 13 2022
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STATUS
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approved
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