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 A084528 #7 Jul 29 2017 12:42:51 %S A084528 1,2,5,17,59,201,703,2405 %N A084528 Partial sums of A084529. Positions of ones in the first differences of A084526. %H A084528 A. Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %K A084528 nonn %O A084528 1,2 %A A084528 _Antti Karttunen_, Jun 02 2003