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 A116448 #8 Nov 01 2016 10:00:38 %S A116448 88,225,365,687,4333,10756,30707,60223,90613 %N A116448 Orbital periods (length of year) of planets in the solar system, to the nearest whole number of terrestrial days. %C A116448 There is currently some question whether Pluto should be considered a planet and whether some other objects should also be considered planets. This uses the list of planets in common usage at this time. Values in this sequence will gradually change with time, primarily due to changes in the Earth's rotational period; but any changes will take a long time, particularly for the inner planets. %H A116448 Wikipedia, <a href="http://en.wikipedia.org/wiki/Orbital_period">Orbital period</a>. %K A116448 fini,full,nonn %O A116448 1,1 %A A116448 _Franklin T. Adams-Watters_, Mar 15 2006 %E A116448 Definition corrected by _Felix Fröhlich_, Oct 30 2016