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 A287999 #14 Jun 28 2017 23:47:39 %S A287999 2,20,190,1896,19950,221720,2596498,31839772 %N A287999 Number of tilings of a stackable 8 sphinx tile shape. %C A287999 Long narrow frames such as these are a good place to search for small symmetric sphinx tiled shapes. %H A287999 Craig Knecht, <a href="/A287999/a287999_3.png">Example for sequence.</a> %H A287999 Craig Knecht, <a href="/A287999/a287999_4.png">Sphinx tile classification.</a> %H A287999 Craig Knecht, <a href="/A287999/a287999_2.png">Visual scan</a> %Y A287999 Cf. A279887. %K A287999 nonn,more %O A287999 0,1 %A A287999 _Craig Knecht_, Jun 04 2017