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A231545
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Numbers n such that n = sigma(n) - sigma(n-1).
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3
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OFFSET
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1,1
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COMMENTS
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Also, numbers n such that antisigma(n) = antisigma(n-1), where antisigma(n) = A024816(n) = the sum of the non-divisors of n that are between 1 and n.
Numbers n such that A163553(n-1) = 0.
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LINKS
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FORMULA
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EXAMPLE
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6 is in sequence because antisigma(6) = antisigma(5) = 9.
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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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