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 A114100 #11 Oct 28 2021 12:37:08 %S A114100 1,3,7,17,35,71,147,319,651,1327 %N A114100 Run lengths associated with A056784. %H A114100 Thomas R. Nicely, <a href="https://faculty.lynchburg.edu/~nicely/gaps/gaplist.html">First occurrence prime gaps</a> [For local copy see A000101] %K A114100 nonn %O A114100 1,2 %A A114100 _R. J. Mathar_, Sep 29 2006 %E A114100 Offset corrected and a(8)-a(10) from _Donovan Johnson_, Jun 03 2013