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 A285586 #12 May 21 2022 14:49:13 %S A285586 1,4,6,8,9,14,15,20,24,25,32 %N A285586 Complete list of numbers n for which there exists no prime number between n and 9n/8 inclusive. %D A285586 David Wells, The Penguin Dictionary of Curious and Interesting Numbers (Revised Edition), Penguin Books, 1997, page 106. %H A285586 Prime Curios! <a href="https://primes.utm.edu/curios/page.php/48.html">48</a> %K A285586 fini,nonn,full %O A285586 1,2 %A A285586 _Matt Westwood_, Apr 22 2017