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Template:Sequence of the Day for April 28

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Intended for: April 28, 2012

Timetable

  • First draft entered by Alonso del Arte on December 26, 2011
  • Draft reviewed by Daniel Forgues on April 26, 2012
  • Draft to be approved by March 28, 2012
Yesterday's SOTD * Tomorrow's SOTD

The line below marks the end of the <noinclude> ... </noinclude> section.



A181284: Decimal expansion of
2  
9
121
 100 30  − 
1208
121
.
2727272727...272727272727.272727...2727089696969...

(The first ellipsis omits four instances, out of fifteen, of the digit pairs 27, the second omits nine, out of fourteen.)

This is an example of a so-called zebra irrational number.

Most irrational numbers in the OEIS are small and in the unit interval (between 0 and 1). This is one is an interesting exception to that trend.