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A225775 Numbers k such that antisigma(x) = antisigma(x+1) = k has solution. 2
0, 9, 36844389, 129894940, 446591224981504 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Antisigma(n) = A024816(n) = the sum of the nondivisors of n that are between 1 and n.

Conjecture: also numbers k such that antisigma(n) = antisigma(m) = k has solution for distinct numbers n and m. - Jaroslav Krizek, Nov 10 2013

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

36844389 is in the sequence because 36844389 = antisigma(8585) = antisigma(8586).

CROSSREFS

Cf. A067816 (numbers n such that antisigma(n) = antisigma(n+1)).

Sequence in context: A131678 A229687 A029983 * A154110 A235400 A028446

Adjacent sequences:  A225772 A225773 A225774 * A225776 A225777 A225778

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Jul 26 2013

STATUS

approved

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Last modified February 21 03:02 EST 2020. Contains 332086 sequences. (Running on oeis4.)