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 A048313 #6 Oct 13 2019 16:38:46 %S A048313 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,17,34,51,68,85,102,119,136,153, %T A048313 170,187,204,221,238,255,256,273,290,307,324,341,358,375,392,409,426, %U A048313 443,460,477,494,511,512,529,546,563,580,597,614,631,648,665,682,699 %N A048313 Numbers whose base-16 expansions, read from left to right, have run lengths that strictly increase. %Y A048313 Cf. A037015, A043705, A043719, A044827, A044965. %K A048313 nonn,base %O A048313 0,3 %A A048313 _Patrick De Geest_, Feb 15 1999