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 A004184 #6 Oct 24 2023 20:41:03 %S A004184 0,1,2,3,4,5,6,7,8,0,10,11,12,13,14,15,16,17,18,1,20,21,22,23,24,25, %T A004184 26,27,28,2,30,31,32,33,34,35,36,37,38,3,40,41,42,43,44,45,46,47,48,4, %U A004184 50,51,52,53,54,55,56,57,58,5,60,61,62,63,64,65,66,67,68,6,70,71 %N A004184 Omit 9's from n. %K A004184 nonn,base %O A004184 0,3 %A A004184 _N. J. A. Sloane_