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%I #7 Apr 01 2014 05:22:05
%S 5,17,23,25,41,47,53,59,71,83,101,107,113,125,131,137,149,167,173,179,
%T 191,197,227,239,251,257,263,269,281,289,293,311,317,347,353,359,383,
%U 389,401,419,443,449,461,467,479,503,509,529,557,563,569,587,593
%N Numbers with primitive root -12.
%H Vincenzo Librandi, <a href="/A240031/b240031.txt">Table of n, a(n) for n = 1..1000</a>
%t pr = -12; Select[Range[2, 700], MultiplicativeOrder[pr, #] == EulerPhi[#] &]
%Y 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).
%Y 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).
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Apr 01 2014
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