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A074749 Smallest difference between consecutive anti-divisors of n (ordered by size). 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

COMMENTS

See A066272 for definition of anti-divisor.

LINKS

Table of n, a(n) for n=1..86.

EXAMPLE

For n=13, anti-divisors={2,3,5,9}; differences={1,2,4}; a(13) = smallest difference = 1.

MATHEMATICA

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 *)

CROSSREFS

Cf. A066272, A130799.

Sequence in context: A186520 A158570 A295224 * A194524 A117136 A139227

Adjacent sequences:  A074746 A074747 A074748 * A074750 A074751 A074752

KEYWORD

nonn

AUTHOR

Jason Earls, Sep 06 2002

EXTENSIONS

More terms from Amiram Eldar, Feb 03 2020

STATUS

approved

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Last modified May 14 13:50 EDT 2021. Contains 343884 sequences. (Running on oeis4.)