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 A048310 #6 Oct 13 2019 16:40:03 %S A048310 0,1,2,3,4,5,6,7,8,9,10,11,12,14,28,42,56,70,84,98,112,126,140,154, %T A048310 168,169,183,197,211,225,239,253,267,281,295,309,323,337,338,352,366, %U A048310 380,394,408,422,436,450,464,478,492,506,507,521,535,549,563,577,591,605 %N A048310 Numbers whose base-13 expansions, read from left to right, have run lengths that strictly increase. %Y A048310 Cf. A037015, A043702, A043716, A044824, A044962. %K A048310 nonn,base %O A048310 0,3 %A A048310 _Patrick De Geest_, Feb 15 1999