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 A198473 #22 May 01 2023 07:54:36 %S A198473 0,1,4,2,8,3,12,5,16,6,20,7,24,9,28,10,32,11,36,13,40,14,44,15,48,17, %T A198473 52,18,56,19,60,21,64,22,68,23,72,25,76,26,80,27,84,29,88,30,92,31,96, %U A198473 33,100,34,104,35,108,37,112,38,116,39,120,41,124,42,128 %N A198473 Duplicate of A026185. %K A198473 dead %O A198473 0,3 %A A198473 _Ray Chandler_, May 01 2023