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 A084517 #11 Jan 09 2023 07:53:58 %S A084517 16,6,3,1,2,7,41,210,1014,4677,20779,89800,379952 %N A084517 First occurrence of n in A084511. %H A084517 Antti Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %Y A084517 Cf. A084507, A084527. %K A084517 nonn,more %O A084517 0,1 %A A084517 _Antti Karttunen_, Jun 02 2003