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 A052312 #8 Dec 19 2015 12:58:34 %S A052312 1,-1,0,1,0,-1,-2,-1,8,25,26,-111,-590,-1419,456,21639,99822,202875, %T A052312 -545926,-7583365,-36354050,-71015561,372995254,4834925399, %U A052312 25950214696,60006459617,-337120306782,-5124389194155,-33147265576814 %N A052312 Column 1 of triangle A052311. %H A052312 <a href="/index/Ne#necklaces">Index entries for sequences related to necklaces</a> %K A052312 sign %O A052312 1,7 %A A052312 _Christian G. Bower_, Dec 15 1999