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 A240100 #9 Apr 01 2014 08:49:48 %S A240100 2,4,5,10,19,25,37,38,41,43,47,50,59,61,67,74,82,83,86,94,97,103,113, %T A240100 118,122,125,127,134,151,166,173,179,191,193,194,197,206,226,233,239, %U A240100 250,251,254,263,269,271,277,302,313,317,331,346,358,359,361,382 %N A240100 Numbers with primitive root -17. %H A240100 Vincenzo Librandi, <a href="/A240100/b240100.txt">Table of n, a(n) for n = 1..1000</a> %t A240100 pr = -17; Select[Range[2, 400], MultiplicativeOrder[pr, #] == EulerPhi[#] &] %Y A240100 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), A240101 (r=17). %Y A240100 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). %K A240100 nonn,easy %O A240100 1,1 %A A240100 _Vincenzo Librandi_, Apr 01 2014