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 A084527 #11 Jan 09 2023 07:54:10 %S A084527 16,6,3,1,2,7,37,181,799,3503,14365,58033,225215 %N A084527 First occurrence of n in A084521. %H A084527 Antti Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %Y A084527 Cf. A084507, A084517. %K A084527 nonn,more %O A084527 0,1 %A A084527 _Antti Karttunen_, Jun 02 2003