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 A241784 #26 Feb 16 2025 08:33:22 %S A241784 1,1,2,6,13,44,144,577,2457,12499,72394,508942,4408389,49858593, %T A241784 769196039,16729819397 %N A241784 Number of simple connected graphs on n nodes with no cycle of length 5. %C A241784 Inverse EULER transformation of A345216 (not necessarily connected) %H A241784 Travis Hoppe and Anna Petrone, <a href="https://github.com/thoppe/Encyclopedia-of-Finite-Graphs">Encyclopedia of Finite Graphs</a> %H A241784 T. Hoppe and A. Petrone, <a href="http://arxiv.org/abs/1408.3644">Integer sequence discovery from small graphs</a>, arXiv preprint arXiv:1408.3644 [math.CO], 2014. %H A241784 F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 29e68fa. %H A241784 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/CycleGraph.html">Cycle Graph</a> %Y A241784 Cf. Squarefree (C_4) graphs A077269. %K A241784 nonn,hard,more %O A241784 1,3 %A A241784 _Travis Hoppe_ and _Anna Petrone_, Apr 28 2014 %E A241784 a(11)-a(14) added using tinygraph by _Falk Hüffner_, Sep 22 2020 %E A241784 a(15) and a(16) added by _Brendan McKay_, Jun 10 2021