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 A243273 #14 Feb 18 2025 15:35:04 %S A243273 0,0,0,1,7,43,379,6185,177071,9305068 %N A243273 Number of unlabeled simple graphs with n nodes that are Hamiltonian and integral. %H A243273 Travis Hoppe and Anna Petrone, <a href="https://github.com/thoppe/Encyclopedia-of-Finite-Graphs">Encyclopedia of Finite Graphs</a>. %H A243273 Travis Hoppe and Anna 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 A243273 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HamiltonianGraph.html">Hamiltonian Graph</a>. %H A243273 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IntegralGraph.html">Integral Graph</a>. %Y A243273 Cf. A003216 (Hamiltonian graphs), A064731 (integral graphs). %K A243273 nonn,more %O A243273 1,5 %A A243273 _Travis Hoppe_ and _Anna Petrone_, Jun 02 2014