Template:Sequence of the Day for January 16

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 ✓

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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.