This site is supported by donations to The OEIS Foundation.

Template:Sequence of the Day

From OeisWiki
(Redirected from Sequence of the day)
Jump to: navigation, search

Sequence of the Day for November 16

A047679: Denominator in full Stern–Brocot tree.

{ 1, 2, 1, 3, 3, 2, 1, 4, 5, 5, ... }
This sequence includes the terms 16, 11, 11 and 11, 16. As such, it can represent both 16 November ’11 and November 16. Beyond that, the Stern–Brocot tree is a fascinating way to approximate real numbers using fractions. This image (http://www.kerrymitchellart.com/gallery24/inspired.html) shows a representation of approximating
ϕ
, the Golden ratio. In the image, the widths of the spires are related to the denominators of the fractions encountered. Smaller denominators lead to larger structures.





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

For more details about today's Sequence of the Day, see {{Sequence of the Day for November 16}}.

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.