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Template:Sequence of the Day for January 16

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Intended for: January 16, 2013

Timetable

  • First draft entered by Alonso del Arte on December 15, 2011
  • Draft reviewed by Daniel Forgues on January 15, 2012 and January 16, 2016
  • Draft approved by Alonso del Arte on December 16, 2012
Yesterday's SOTD * Tomorrow's SOTD

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A033715: Number of integer solutions
(x, y)
to the equation
x 2 + 2 y 2 = n, n   ≥   0
.
{ 1, 2, 2, 4, 2, 0, 4, 0, 2, 6, 0, 4, 4, ... }

This pertains to a Diophantine equation that was studied by Ramanujan.