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 A220893 #7 Dec 09 2019 03:12:19 %S A220893 1,14,105,560,2296,6880,8904,-62320,-641704,-3698240,-15975896, %T A220893 -51517200,-89612104,292372640,3914285704,24216707920,110047971096, %U A220893 378638107520,797868873704,-1090920314960,-23361420852104,-156886807005600,-750668428691896,-2739638121913840,-6634132579281704 %N A220893 G.f.: 1/H(-x), where H(x) = (1+8*x+22*x^2+8*x^3+x^4)/(1-x)^6. %H A220893 M. Hering and B. J. Howard, <a href="https://arxiv.org/abs/1211.3941">The ring of evenly weighted points on the line</a>, arXiv:1211.3941 [math.AG], 2012-2014; See example 3.8. %Y A220893 Cf. A220892. %K A220893 sign %O A220893 0,2 %A A220893 _N. J. A. Sloane_, Dec 30 2012