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 A037979 #9 Aug 22 2021 00:13:01 %S A037979 85,170,255,256,340,342,343,426,511,512,597,680,681,683,767,768,853, %T A037979 938,1020,1021,1022,1025,1026,1027,1109,1194,1279,1280,1360,1361,1362, %U A037979 1363,1368,1369,1370,1371,1372,1373,1374,1375,1450 %N A037979 Numbers whose maximal base-4 run length is 4. %Y A037979 Cf. A043278. %K A037979 nonn,base %O A037979 1,1 %A A037979 _Clark Kimberling_