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 A045927 #9 Oct 10 2019 00:44:53 %S A045927 2,4,6,8,22,24,26,28,44,46,48,66,68,88,222,224,226,228,244,246,248, %T A045927 266,268,288,444,446,448,466,468,488,666,668,688,888,2222,2224,2226, %U A045927 2228,2244,2246,2248,2266,2268,2288,2444,2446,2448,2466,2468,2488,2666,2668 %N A045927 Digits even, nonzero and nondecreasing. %H A045927 <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>. %Y A045927 Cf. A014261, A014263, A045926. %K A045927 nonn,easy,base %O A045927 1,1 %A A045927 _Felice Russo_ %E A045927 More terms from _Patrick De Geest_, Jun 15 1999