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Template:Sequence of the Day for February 27

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Intended for: February 27, 2012

Timetable

  • First draft entered by Alonso del Arte on October 24, 2011
  • Draft reviewed by Daniel Forgues on February 22, 2016, February 27, 2017
  • Draft to be approved by January 27, 2012

Yesterday's SOTD * Tomorrow's SOTD

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A030133:
a (n)
is the sum of base 10 digits of
a (n  −  2) + a (n  −  1)
, with
a (0) = L0 = 2
,
a (1) = L1 = 1
. (Digital root sequence for Lucas numbers.)
{ 2, 1, 3, 4, 7, 2, 9, ... }

I don’t know of many recurrence relations involving base 10 digits (or digits in any base, for that matter). That alone makes this sequence interesting.