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 A061731 #15 Sep 22 2013 17:22:04 %S A061731 12391,27191,56611,57791,92761,95929,99289,104281,112249,132049, %T A061731 140281,149689,157081,162649,163321,174241,187871,204601,206641, %U A061731 209563,215161,228841,244561,250741,275881,278881,291481,302299,309289,317831,333451 %N A061731 Primes with 26 as smallest positive primitive root. %H A061731 Vincenzo Librandi, <a href="/A061731/b061731.txt">Table of n, a(n) for n = 1..6000</a> %t A061731 Select[ Prime@Range@290000, PrimitiveRoot@# == 26 &] (* _Robert G. Wilson v_, May 11 2001 *) %Y A061731 Cf. A001918, A001126, A019352. %K A061731 nonn %O A061731 1,1 %A A061731 _Klaus Brockhaus_, May 06 2001