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 A241043 #4 Apr 16 2014 18:00:51 %S A241043 5,19,29,53,101,139,149,163,173,197,211,269,293,317,379,389,461,509, %T A241043 557,653,677,701,773,797,821,859,907,941,1061,1109,1123,1229,1277, %U A241043 1291,1301,1373,1483,1493,1637,1733,1747,1901,1949,1973,1987,1997,2069,2083 %N A241043 Primes having primitive roots 2 and 3. %H A241043 T. D. Noe, <a href="/A241043/b241043.txt">Table of n, a(n) for n = 1..1000</a> %t A241043 fQ[p_, n_] := MultiplicativeOrder[p, n] == n - 1; Select[Prime[Range[400]], fQ[2, #] && fQ[3, #] &] %Y A241043 Cf. A001122, A019334, A213052. %K A241043 nonn %O A241043 1,1 %A A241043 _T. D. Noe_, Apr 16 2014