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 A167801 #5 Mar 31 2014 01:57:20 %S A167801 2,4,11,17,19,22,34,37,38,53,59,73,74,79,97,106,113,118,121,131,137, %T A167801 139,146,151,157,158,173,179,193,194,197,226,233,239,242,257,262,274, %U A167801 277,278,289,293,302,311,314,317,331,346,353,358,359,361,373,386,394,397 %N A167801 Numbers with primitive root -5. %H A167801 Vincenzo Librandi, <a href="/A167801/b167801.txt">Table of n, a(n) for n = 1..1000</a> %t A167801 pr=-5; Select[Range[2,2000], MultiplicativeOrder[pr,# ] == EulerPhi[ # ] &] %Y A167801 Cf. A105877 (primes with primitive root -5) %K A167801 nonn %O A167801 1,1 %A A167801 _T. D. Noe_, Nov 12 2009