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1, 3, 4, 7, 6, 8, 15, 13, 18, 12, 14, 24, 24, 31, 18, 20, 32, 36, 24, 31, 42, 40, 30, 32, 63, 48, 54, 48, 38, 60, 56, 42, 44, 84, 78, 72, 48, 57, 93, 72, 98, 54, 72, 80, 90, 60, 62, 96, 104, 127, 84, 68, 126, 96, 72, 74, 114, 124, 140, 96, 80, 121, 126, 84, 108, 132
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internal format)
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OFFSET
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1,2
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COMMENTS
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LINKS
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FORMULA
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MATHEMATICA
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sddn[n_]:=Module[{s=DivisorSigma[1, n]}, If[s<2n, s, 0]]; DeleteCases[ sddn/@ Range[ 100], 0] (* Harvey P. Dale, Jan 02 2015 *)
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PROG
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CROSSREFS
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Cf. A204822 (sum of divisors of abundant numbers), A205099 (sum of proper divisors of deficient numbers).
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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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