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Template:Sequence of the Day for July 28

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Intended for: July 28, 2012

Timetable

  • First draft entered by Alonso del Arte on May 28, 2011
  • Draft reviewed by Alonso del Arte on July 22, 2011
  • Draft to be approved by June 28, 2012

Yesterday's SOTD * Tomorrow's SOTD

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A006127:
2n + n, n   ≥   0
.
{ 1, 3, 6, 11, 20, 37, 70, 135, 264, 521, 1034, 2059, 4108, 8205, ... }

In The Book of Numbers, John Conway and Richard Guy coyly describe this sequence as “not very different from the powers of 2.”