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Template:Sequence of the Day

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Sequence of the Day for December 12

A033880: Abundance of
n
.
{ ..., –14, 0, –28, 12, –30, –1, –18, ... }
The negative
a (n)
in this listing correspond to deficient numbers, the zeros correspond to perfect numbers and the positives correspond to abundant numbers. I'm choosing to start the listing here from
27
in order to get a better mix of abundant, perfect and deficient numbers.





The following is in the <noinclude> ... </noinclude> section.

For more details about today's Sequence of the Day, see {{Sequence of the Day for December 12}}.

Guidelines for selecting the Sequence of the Day

  • These are not rules. But if they were rules, they would only be enforced by the honor system.
  • Whenever practical, the Sequence of the Day should bear some relation either to the calendar date (hint: browse arXiv e-prints by date) or to some recent newsworthy event.
  • The write-up should be brief and not require advanced mathematical knowledge to understand.
  • Positive preference given to sequences with keyword:nice.
  • No special preference for sequences with keyword:core.
  • Negative preference for sequences with keyword:uned or keyword:less. However, it is perfectly acceptable to polish up an uned sequence just prior to featuring.
  • Each OEIS contributor should get at least one opportunity to choose the Sequence of the Day.
  • The chooser ought not choose a sequence they have authored. But one they have edited heavily is perfectly acceptable.
  • Ideally this will be changed each day at 0:00 per the OEIS Wiki clock. Each Sequence of the Day should be up for at least 22 hours but not more than 26 hours.
  • There shouldn't be a big, heavy, bureaucratic apparatus to administer this feature.
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