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 A116117 #11 Feb 20 2019 14:54:26 %S A116117 6,5346,8083,10578,45531,58626,2392902,2609443,7272838,51248898, %T A116117 98009803,159728062051,360408196038,523637103531,770378933826, %U A116117 998000998003,1214959556998,1434212848998,3860012299771,4243705560771 %N A116117 Duplicate of A115431. %Y A116117 Cf. A116104, A116116, A116118, A054214, A116248. %K A116117 dead %O A116117 1,1