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 A165917 #3 Mar 30 2012 17:34:11 %S A165917 0,0,2,5,5,7,14,23,16,12,25,44,31,37,55,86,56,73,57,117,100,95,141, %T A165917 188,117,86,143,193,138,172,216,287,233,161,251,393,231,264,403,520, %U A165917 319,390,328,571,552,398,509,706,442,422,489,731,429,581,707,898,657,477 %N A165917 a(n) = sum of the squarefree quadratic non-residues of n. %H A165917 C. H. Gribble, <a href="/A165917/b165917.txt">Table of n, a(n) for n=1,...,1000</a>. %Y A165917 Cf. A165916 %K A165917 nonn %O A165917 1,3 %A A165917 _Christopher Hunt Gribble_, Sep 30 2009 %E A165917 a(1) added and definition corrected by _Christopher Hunt Gribble_, Oct 05 2009