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%I #5 Apr 01 2014 03:53:53
%S 2,7,13,14,17,26,29,34,41,49,58,73,79,82,83,98,101,107,109,127,131,
%T 139,146,149,151,158,166,167,169,173,197,202,214,218,227,233,239,254,
%U 262,263,271,277,278,281,283,289,293,298,302,307,334,338,343,346,347
%N Numbers with primitive root -11.
%H Vincenzo Librandi, <a href="/A240029/b240029.txt">Table of n, a(n) for n = 1..1000</a>
%t pr = -11; Select[Range[2, 400], 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).
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Apr 01 2014
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