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 A048311 #6 Oct 13 2019 16:39:39 %S A048311 0,1,2,3,4,5,6,7,8,9,10,11,12,13,15,30,45,60,75,90,105,120,135,150, %T A048311 165,180,195,196,211,226,241,256,271,286,301,316,331,346,361,376,391, %U A048311 392,407,422,437,452,467,482,497,512,527,542,557,572,587,588,603,618,633 %N A048311 Numbers whose base-14 expansions, read from left to right, have run lengths that strictly increase. %Y A048311 Cf. A037015, A043703, A043717, A044825, A044963. %K A048311 nonn,base %O A048311 0,3 %A A048311 _Patrick De Geest_, Feb 15 1999