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 A230720 #5 Oct 28 2013 17:47:37 %S A230720 0,14,30,38,70,78,98,124,166,174,194,220,242,268,292,304,390,398,418, %T A230720 444,466,492,516,528,578,604,628,640,684,696,724,762,902,910,930,956, %U A230720 978,1004,1028,1040,1090,1116,1140,1152,1196,1208,1236,1274,1346,1372 %N A230720 Even sorting numbers, cf. A003071. %C A230720 A003071(a(n)) mod 2 = 0. %C A230720 a(n) = A003071(A092246(n)). %H A230720 Reinhard Zumkeller, <a href="/A230720/b230720.txt">Table of n, a(n) for n = 1..10000</a> %H A230720 <a href="/index/So#sorting">Index entries for sequences related to sorting</a> %o A230720 (Haskell) %o A230720 a230720 = a003071 . a092246 %o A230720 a230720_list = filter even a003071_list %K A230720 nonn %O A230720 1,2 %A A230720 _Reinhard Zumkeller_, Oct 28 2013