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 A121836 #8 Mar 26 2022 14:41:01 %S A121836 10,14,15,18,21,22,26,27,28,32,33,34,35,38,39,40,44,45,46,48,50,51,52, %T A121836 54,55,57,58,60,62,63,65,66,68,69,70,74,75,76,77,78,80,82,84,85,86,87, %U A121836 88,91,92,93,94,95,96,98,99,102,104,105,106,108,111,112,114,115,116,117 %N A121836 Erroneous version of A308874. %K A121836 dead %O A121836 1,1