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 A202782 #10 May 11 2020 19:21:55 %S A202782 7,49,5215,21841937,3430832678207 %N A202782 Duplicate of A067214. %K A202782 dead %O A202782 1,1