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%I #10 Apr 01 2014 05:21:40
%S 5,7,17,25,31,41,43,49,53,67,101,103,113,125,127,137,139,149,151,163,
%T 173,197,223,257,269,281,283,289,293,317,343,353,367,379,389,401,449,
%U 461,509,523,547,557,569,571,593,607,617,619,625,631,641,653,691
%N Numbers with primitive root 12.
%H Vincenzo Librandi, <a href="/A240030/b240030.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).
%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), A240031 (r=-12).
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Apr 01 2014
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