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 A358290 #5 Nov 30 2022 07:46:23 %S A358290 1,2,3,5,6,12,61 %N A358290 Erroneous version of A191783. %C A358290 Included in accordance with OEIS policy of including published but erroneous sequences to serve as pointers to the correct versions. %H A358290 John W. Milnor, <a href="https://www.ams.org/notices/201106/rtx110600804p.pdf">Differential Topology Forty-six Years Later</a>, Notices Amer. Math. Soc. 58 (2011), 804-809. %Y A358290 Cf. A191783. %K A358290 dead %O A358290 1,2