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 A317949 #3 Aug 13 2018 23:03:04 %S A317949 1,4,25,124,574,2156,8258 %N A317949 Erroneous version of A013582. %C A317949 These incorrect values were listed in A013582 from about 1996 to 2018. %C A317949 Included in accordance with OEIS policy of including published but incorrect versions of sequences. %K A317949 dead %O A317949 0,2