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A074749
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Smallest difference between consecutive anti-divisors of n (ordered by size).
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0
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0, 0, 0, 0, 1, 0, 1, 2, 4, 1, 1, 3, 1, 1, 4, 8, 1, 1, 1, 5, 4, 1, 1, 9, 1, 1, 1, 2, 1, 8, 1, 2, 1, 1, 1, 16, 1, 1, 1, 6, 1, 1, 1, 5, 1, 1, 1, 13, 1, 1, 4, 1, 1, 8, 1, 13, 1, 1, 1, 1, 1, 1, 1, 40, 1, 3, 1, 1, 4, 1, 1, 2, 1, 1, 4, 1, 1, 1, 1, 4, 1, 1, 1, 5, 1, 1
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OFFSET
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1,8
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COMMENTS
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See A066272 for definition of anti-divisor.
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LINKS
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EXAMPLE
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For n=13, anti-divisors={2,3,5,9}; differences={1,2,4}; a(13) = smallest difference = 1.
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MATHEMATICA
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min[s_] := If[Length[s] > 0, Min[s], 0]; min /@ Differences /@ Table[Select[Range[2, n - 1], Abs[Mod[n, #] - #/2] < 1 &], {n, 100}] (* Amiram Eldar, Feb 03 2020 after Harvey P. Dale at A066272 *)
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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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STATUS
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approved
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