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Template:Sequence of the Day for October 13

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Intended for: October 13, 2011

Timetable

  • First draft entered by Alonso del Arte on August 8, 2011
  • Draft reviewed by Mitch Harris on August 9, 2011
  • Draft approved by Daniel Forgues on October 14, 2012
Yesterday's SOTD * Tomorrow's SOTD

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



A003462:
3n  −  1
2
=
n  − 1

i  = 0
3i, n   ≥   1.
{ 1, 4, 13, 40, 121, 364, 1093, ... }
This sequence gives the repunits in base 3, i.e. the sum of the first
n
nonnegative powers of 3, with A000244 being the sequence of [nonnegative] powers of 3.