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 A026208 #8 Jan 31 2020 05:08:51 %S A026208 1,3,5,2,7,9,11,4,13,15,17,6,19,21,23,8,25,27,29,10,31,33,35,12,37,39, %T A026208 41,14,43,45,47,16,49,51,53,18,55,57,59,20,61,63,65,22,67,69,71,24,73, %U A026208 75,77,26,79,81,83,28,85,87,89,30,91,93,95 %N A026208 Duplicate of A026184. %K A026208 dead %O A026208 1,2