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 A241047 #4 Apr 16 2014 18:00:23 %S A241047 293,2477,4373,6173,7013,9173,9677,10853,13037,13397,13613,13877, %T A241047 14957,15413,17093,17597,18413,18917,19157,22277,22613,24317,26813, %U A241047 27653,27893,29333,30197,31517,33893,34613,34877,35573,37253,40493,41117,41333,42437 %N A241047 Primes having primitive roots 2, 3, 5, 7, 11, and 13. %H A241047 T. D. Noe, <a href="/A241047/b241047.txt">Table of n, a(n) for n = 1..1000</a> %t A241047 fQ[p_, n_] := MultiplicativeOrder[p, n] == n - 1; Select[Prime[Range[4500]], fQ[2, #] && fQ[3, #] && fQ[5, #] && fQ[7, #] && fQ[11, #] && fQ[13, #] &] %Y A241047 Cf. A001122, A019334, A019335, A019337, A019339, A019341, A213052. %K A241047 nonn %O A241047 1,1 %A A241047 _T. D. Noe_, Apr 16 2014