This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A165914 #3 Mar 30 2012 17:34:11 %S A165914 0,1,1,1,1,4,3,1,8,12,9,1,14,21,17,1,31,31,47,6,23,49,25,1,72,103,72, %T A165914 22,77,72,58,18,72,177,121,14,176,180,79,1,202,172,276,76,95,249,184, %U A165914 34,298,318,251,60,362,263,137,1,242,479,448,22,456,432,214,149 %N A165914 a(n) = sum of the squarefree quadratic residues of n. %H A165914 C. H. Gribble, <a href="/A165914/b165914.txt">Table of n, a(n) for n=1,...,1000</a>. %Y A165914 Cf: A165913 %K A165914 nonn %O A165914 1,6 %A A165914 _Christopher Hunt Gribble_, Sep 30 2009 %E A165914 a(1) added and Cf corrected by _Christopher Hunt Gribble_, Oct 05 2009