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 A048304 #6 Oct 13 2019 16:42:45 %S A048304 0,1,2,3,4,5,6,8,16,24,32,40,48,49,57,65,73,81,89,97,98,106,114,122, %T A048304 130,138,146,147,155,163,171,179,187,195,196,204,212,220,228,236,244, %U A048304 245,253,261,269,277,285,293,294,302,310,318,326,334,342,343,400,457 %N A048304 Numbers whose base-7 expansions, read from left to right, have run lengths that strictly increase. %Y A048304 Cf. A037015, A043696, A043710, A044818, A044956. %K A048304 nonn,base %O A048304 0,3 %A A048304 _Patrick De Geest_, Feb 15 1999