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 A289941 #23 Aug 17 2017 21:11:29 %S A289941 18,444,11700,320640,9012060,257487624 %N A289941 Number of tilings of n interlocking sphinx tiled shape subunits. %C A289941 The shape for this sequence attempts to find a connection between the unique geometry of the sphinx tile and a polymerization process. %C A289941 The number of tilings of a stackable sphinx tiled shape has previously been described A287999. %C A289941 In contrast to the stackable shape this shape is interlocking. %C A289941 This shape has one female and three male parts. %C A289941 The properties of this shape that inhibit different polymerizations are noted. %C A289941 The various polymer configurations from a central nucleus are shown. %H A289941 Craig Knecht, <a href="/A289941/a289941.png">Example for this sequence.</a> %H A289941 Craig Knecht, <a href="/A289941/a289941_4.png">Geometry of the sphinx applied to a polymerization process.</a> %H A289941 Craig Knecht, <a href="/A289941/a289941_6.png">Other examples of interlocking shapes.</a> %Y A289941 Cf. A067411, A279887, A287999. %K A289941 nonn,more %O A289941 1,1 %A A289941 _Craig Knecht_, Jul 15 2017