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 A019352 #14 Mar 31 2014 04:07:58 %S A019352 3,7,29,41,43,47,53,61,73,89,97,101,107,131,137,139,157,167,173,179, %T A019352 193,239,251,269,271,281,283,347,353,359,373,383,389,409,419,443,449, %U A019352 457,463,467,479,491,563,593,617,631,653,659,701,743,761,797,829,839,863,883,929 %N A019352 Primes with primitive root 26. %H A019352 Vincenzo Librandi, <a href="/A019352/b019352.txt">Table of n, a(n) for n = 1..1000</a> %H A019352 <a href="/index/Pri#primes_root">Index entries for primes by primitive root</a> %t A019352 pr=26; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &] %K A019352 nonn %O A019352 1,1 %A A019352 _David W. Wilson_