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 A077109 #8 Mar 07 2022 15:54:45 %S A077109 0,0,4,18,11,2,28,15,0,44,25,4,72,47,20,118,87,54,19,151,112,71,28, %T A077109 200,153,104,53,0,216,159,100,39,307,242,175,106,35,359,284,207,128,47 %N A077109 Duplicate of A070923. %K A077109 dead %O A077109 0,3