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 A240101 #8 Apr 01 2014 08:49:50 %S A240101 2,3,5,6,7,10,11,14,22,23,25,31,37,41,46,49,50,61,62,74,82,97,98,107, %T A240101 113,121,122,125,131,139,167,173,193,194,197,211,214,226,227,233,242, %U A240101 250,262,269,277,278,283,311,313,317,334,343,346,347,367,379,386 %N A240101 Numbers with primitive root 17. %H A240101 Vincenzo Librandi, <a href="/A240101/b240101.txt">Table of n, a(n) for n = 1..1000</a> %t A240101 pr = 17; Select[Range[2, 400], MultiplicativeOrder[pr, #] == EulerPhi[#] &] %Y A240101 Cf. numbers with positive primitive root r: A167791 (r=2), A167792 (r=3), A167793 (r=5), A167794 (r=6), A167795 (r=7), A167796 (r=8), A167797 (r=10), A240028 (r=11), A240030 (r=12), A240032 (r=13), A240094 (r=14), A240096 (r=15). %Y A240101 Cf. numbers with negative primitive root r: A167798 (r=-2), A167799 (r=-3), A167800 (r=-4), A167801 (r=-5), A167802 (r=-6), A167803 (r=-7), A167804 (r=-8), A167805 (r=-9), A167806 (r=-10), A240029 (r=-11), A240031 (r=-12), A240093 (r=-13), A240095 (r=-14), A240097 (r=-15), A240100 (r=-17). %K A240101 nonn,easy %O A240101 1,1 %A A240101 _Vincenzo Librandi_, Apr 01 2014