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 A065839 #12 Oct 25 2019 20:01:04 %S A065839 3,13,53,859,880571,230836658783, %T A065839 18727694659923768688081143062632211180505377, %U A065839 1448985191439414787314128433365601157107793684026416650771108564122239 %N A065839 Primes found in A065838. %H A065839 <a href="http://www.mathpages.com/home/kmath185.htm">In Defense of Base-Related Problems</a> %Y A065839 Cf. A065828 up to A065840, A000796, A011545, A011546, A055145, A005042, A060421, A039954, A048796. %K A065839 nonn,base %O A065839 1,1 %A A065839 _Patrick De Geest_, Nov 24 2001