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 A133434 #9 Aug 04 2018 02:52:28 %S A133434 3,7,23,41,109,457,2137,14293,55441,57991,221101,513991,2447761, %T A133434 3248701,4076641,11643607,16135981,25400761,25738831,399263281, %U A133434 741488749,794932741,5516118301,9237839521,10453202761,20833333501 %N A133434 Records in A084739. %H A133434 N. J. A. Sloane, <a href="/A133434/b133434.txt">Table of n, a(n) for n=1..34</a> (from the web page of Tomás Oliveira e Silva) %H A133434 Tomás Oliveira e Silva, <a href="http://sweet.ua.pt/tos/p_roots.html">Least primitive root of prime numbers</a> %K A133434 nonn %O A133434 1,1 %A A133434 _N. J. A. Sloane_, Nov 29 2007