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 A019340 #30 Sep 02 2025 19:16:30 %S A019340 5,7,17,31,41,43,53,67,101,103,113,127,137,139,149,151,163,173,197, %T A019340 223,257,269,281,283,293,317,353,367,379,389,401,449,461,509,523,547, %U A019340 557,569,571,593,607,617,619,631,641,653,691,701,739,751,761,773,787,797,809,821 %N A019340 Primes with primitive root 12. %C A019340 To allow primes less than the specified primitive root m (here, 12) to be included, we use the essentially equivalent definition "Primes p such that the multiplicative order of m mod p is p-1". This comment applies to all of A019334-A019421. - _N. J. A. Sloane_, Dec 03 2019 %H A019340 Vincenzo Librandi, <a href="/A019340/b019340.txt">Table of n, a(n) for n = 1..1000</a> %H A019340 <a href="/index/Pri#primes_root">Index entries for primes by primitive root</a> %t A019340 pr=12; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &] %K A019340 nonn,changed %O A019340 1,1 %A A019340 _David W. Wilson_