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 A151529 #9 Feb 16 2025 08:33:09 %S A151529 1,2,5,11,25,55,121,268,584,1268,2760,5995,13031,28247,61137,132074, %T A151529 285119,615190,1326561,2858429,6154567,13242165 %N A151529 Number of 1-sided strip polykites with n cells. %H A151529 Ed Pegg, Jr., <a href="http://demonstrations.wolfram.com/PolyformExplorer/">Illustrations of polyforms</a> %H A151529 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Polykite.html">Polykite</a> %K A151529 nonn,hard,more %O A151529 1,2 %A A151529 _Ed Pegg Jr_, May 13 2009 %E A151529 a(15)-a(22) from _Joseph Myers_, Nov 28 2010