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 A086991 #18 Feb 16 2025 08:32:50 %S A086991 1,2,4,10,26,85,302,1285,6170,34294,227417,2001617,26098641,520051389, %T A086991 15041205304 %N A086991 Numbers of claw-free simple graphs (not necessarily connected) on n nodes. %H A086991 F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 8489dde. %H A086991 Avraham Itzhakov and Michael Codish, <a href="http://arxiv.org/abs/1511.08205">Breaking Symmetries in Graph Search with Canonizing Sets</a>, arXiv:1511.08205 [cs.AI], 2015 %H A086991 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Claw-FreeGraph.html">Claw-Free Graph</a> %Y A086991 Cf. A022562 (inv. Euler transf.). %K A086991 nonn,more %O A086991 1,2 %A A086991 _Eric W. Weisstein_, Jul 28 2003 %E A086991 a(10) from _Michael Codish_, Dec 01 2015 %E A086991 a(11)-a(15) added using tinygraph by _Falk Hüffner_, Jan 12 2016