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A167800 Numbers with primitive root -4. 19

%I

%S 3,7,9,11,19,23,27,47,49,59,67,71,79,81,83,103,107,121,131,139,163,

%T 167,179,191,199,211,227,239,243,263,271,311,343,347,359,361,367,379,

%U 383,419,443,463,467,479,487,491,503,523,529,547,563,587,599,607,619,647

%N Numbers with primitive root -4.

%H Vincenzo Librandi, <a href="/A167800/b167800.txt">Table of n, a(n) for n = 1..1000</a>

%t pr=-4; Select[Range[2,2000], MultiplicativeOrder[pr,# ] == EulerPhi[ # ] &]

%Y Cf. A105876 (primes with primitive root -4)

%K nonn

%O 1,1

%A _T. D. Noe_, Nov 12 2009

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Last modified October 20 17:28 EDT 2019. Contains 328268 sequences. (Running on oeis4.)