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 A057786 #19 Feb 16 2025 08:32:43 %S A057786 1,2,4,10,27,85,262,873,2917,10011,34561,120815,424468,1501441, %T A057786 5334181,19035075,68167472,244928324,882555803,3188480899,11546307356, %U A057786 41901879156,152359984459,554991766194,2024964145507 %N A057786 Number of polykites with n cells. %D A057786 Computed by Brendan Owen. %H A057786 Andrew Clarke, <a href="http://www.recmath.com/PolyPages/PolyPages/PolyX/PolyX.htm">Other Polyforms</a> %H A057786 Joseph Myers, <a href="https://www.polyomino.org.uk/mathematics/polyform-tiling/">Polyform tiling</a> %H A057786 Ed Pegg, Jr., <a href="http://demonstrations.wolfram.com/PolyformExplorer/">Illustrations of polyforms</a> %H A057786 Jaime Rangel-Mondragón, <a href="https://web.archive.org/web/20190411024906/http://www.mathematica-journal.com/issue/v9i3/polyominoes.html">Polyominoes and Related Families</a>, The Mathematica Journal, Volume 9, Issue 3. %H A057786 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Polykite.html">Polykites</a> %K A057786 nonn,nice,hard,more %O A057786 1,2 %A A057786 _N. J. A. Sloane_, Nov 04 2000 %E A057786 More terms from Brendan Owen (brendan_owen(AT)yahoo.com), Jan 20 2002 %E A057786 Link updated by _William Rex Marshall_, Dec 16 2009 %E A057786 a(22)-a(25) added by _Craig S. Kaplan_ based on tables by Joseph Myers, Jun 03 2024