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 A233741 #10 Jul 20 2018 22:27:44 %S A233741 -1,4,10,12,16,26,42,64,76,84,126,136,138,168,170,180,186,192,216,242, %T A233741 246,260,280,288,298,330,348,380,414,454,498,504,506,516,526,540,558, %U A233741 564,610,618,644,648,666,670,672,702,708,736,778,820,824 %N A233741 Records in A233739. %H A233741 John W. Nicholson, <a href="/A233741/b233741.txt">Table of n, a(n) for n = 1..10000</a> %K A233741 sign %O A233741 1,2 %A A233741 _Jonathan Sondow_, Dec 15 2013