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 A133433 #16 Aug 04 2018 11:22:09 %S A133433 3,7,23,41,71,313,643,4111,53173,107227,533821,1373989,2494381, %T A133433 95525767,823766851,4348468741,226547941621,596653488817,5260410488191 %N A133433 Records in A133432. %C A133433 Also with an initial 2, records in A023048. The next term, which exceeds 10^14, is A023048(108) if it is not 0 (i.e., if there does exist a prime whose smallest primitive root is 108, then it is larger than 10^14). - _Jianing Song_, Aug 01 2018 %H A133433 Tomás Oliveira e Silva, <a href="http://sweet.ua.pt/tos/p_roots.html">Least primitive root of prime numbers</a> %Y A133433 Cf. A023048, A133432. %K A133433 nonn,hard,more %O A133433 1,1 %A A133433 _N. J. A. Sloane_, Nov 29 2007