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 A048327 #8 Oct 11 2019 04:05:55 %S A048327 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 A048327 170,187,204,221,238,255,272,273,274,275,276,277,278,279,280,281,282, %U A048327 283,284,285,286,287,544,545,546,547,548,549,550,551,552,553,554,555 %N A048327 Reading base-16 expansion from left to right, run lengths strictly decrease. %Y A048327 Cf. A037013, A043705, A043719, A044827, A044965. %K A048327 nonn,base %O A048327 0,3 %A A048327 _Patrick De Geest_, Feb 15 1999