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 A384115 #10 May 22 2025 00:59:18 %S A384115 1,2,1,5,10,38,110,400,1370,5026,18249,67885 %N A384115 The number of polyforms on the snub square tiling where the adjacent triangles are combined into rhombi. %C A384115 These are "free" polyforms in that they are counted up to rotation and reflection. %H A384115 Abaroth, <a href="https://abarothsworld.com/Puzzles/Polyforms/PolySquareRhombi.htm">PolySquareRhombi</a>. %H A384115 Peter Kagey, <a href="/A384115/a384115.pdf">Illustration of a(4) = 10</a>. %H A384115 Livio Zucca, <a href="https://www.iread.it/lz/polymultiforms2.html">PolyMultiForms</a> %Y A384115 Cf. A309159. %K A384115 nonn,more %O A384115 0,2 %A A384115 _Peter Kagey_, May 19 2025