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 A070334 #5 Apr 29 2019 03:09:17 %S A070334 0,1,3,5,7,12,15 %N A070334 Erroneous version of A001318. %H A070334 A. Weil, <a href="http://dx.doi.org/10.5169/seals-46896">Two lectures on number theory, past and present</a>, L'Enseign. Math., XX (1974), 87-110 see p. 98; Oeuvres III, 279-302. %K A070334 dead %O A070334 0,3