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 A130134 #14 Oct 11 2016 19:20:21 %S A130134 2,4,8,248,17608,90148,106978,253828,364808,1642798,1926088,6176264, %T A130134 21879938,30484408,34634428,96593698,134396408,223622468,283585928, %U A130134 327327388,457961188,809965148,1709420344,1815124028,2164392968,2360006456,2431619908,2500777828,2922255548,3888155428,5672481928 %N A130134 Even terms in A015922. %C A130134 Also, the even terms of A033554. %H A130134 Max Alekseyev, <a href="/A130134/b130134.txt">Table of n, a(n) for n = 1..314</a> (all terms below 10^15) %o A130134 (PARI) isok(n) = !(n % 2) && (Mod(2^n, n) == Mod(8, n)); \\ _Michel Marcus_, Oct 13 2013 %Y A130134 Cf. A015922, A130133. %K A130134 nonn %O A130134 1,1 %A A130134 _Zak Seidov_, May 12 2007 %E A130134 a(8)-a(9) from _Michel Marcus_, Oct 13 2013 %E A130134 Terms a(10) onward from _Max Alekseyev_, Oct 11 2016