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 A079851 #24 Oct 01 2020 12:54:03 %S A079851 1,2,3,5,7,8,11,13,17,18,19,23,29,31,37,41,43,47,50,53,59,60,61,67,71, %T A079851 73,79,81,83,89,97,98,101,103,105,107,109,113,127,128,131,137,139,149, %U A079851 151,157,163,167,173,179,181,191,193,197,199,211,223,227,229,233,239,241,242 %N A079851 Duplicate of A066720. %K A079851 dead %O A079851 1,2