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 A093107 #13 Nov 13 2016 14:43:49 %S A093107 2,4,8,16,20,32,39,42,55,64,100,128,253,256,272,294,328,342,500,507, %T A093107 512,605,610,666,812,876,930,1024,1081,1474,1711,1806,2048,2058,2485, %U A093107 2500,2756,2943,3088,3403,3502,4096,4624,4656,5671,5819,6162,6498,6591,6655 %N A093107 Numbers n such that the Zsigmondy number Zs(n,3,1) differs from the n-th cyclotomic polynomial evaluated at 3. %C A093107 A019321(n) does not equal A064079(n). %t A093107 Select[Range[10000], GCD[#, Cyclotomic[#, 3]]!=1 &] (* _Emmanuel Vantieghem_, Nov 13 2016 *) %Y A093107 Cf. A093106, A093108, A093109. %K A093107 nonn %O A093107 1,1 %A A093107 _Ralf Stephan_, Mar 20 2004 %E A093107 More terms from _Vladeta Jovovic_, Apr 02 2004 %E A093107 Definition corrected by _Jerry Metzger_, Nov 04 2009