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 A167803 #5 Mar 30 2014 06:49:21 %S A167803 2,3,5,6,9,10,13,17,18,26,27,31,34,41,47,54,59,61,62,81,82,83,89,94, %T A167803 97,101,103,118,122,131,139,162,166,167,169,173,178,194,199,202,206, %U A167803 227,229,241,243,251,257,262,269,271,278,283,289,293,307,334,338,346,349 %N A167803 Numbers with primitive root -7. %H A167803 Vincenzo Librandi, <a href="/A167803/b167803.txt">Table of n, a(n) for n = 1..1000</a> %t A167803 pr=-7; Select[Range[2,2000], MultiplicativeOrder[pr,# ] == EulerPhi[ # ] &] %Y A167803 Cf. A105879 (primes with primitive root -7) %K A167803 nonn %O A167803 1,1 %A A167803 _T. D. Noe_, Nov 12 2009