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 A202783 #10 May 11 2020 19:22:43 %S A202783 8,64,10088,82112704,32701809796548 %N A202783 Duplicate of A067215. %K A202783 dead %O A202783 1,1