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 A307957 #23 Feb 16 2025 08:33:55 %S A307957 0,0,1,2,3,12,49,460,4994,68234,997486,15582567,253005521,4250680376, %T A307957 73293572869,1293638724177 %N A307957 Number of planar graphs of order n with exactly one Hamiltonian cycle. %H A307957 Jan Goedgebeur, Barbara Meersman, and Carol T. Zamfirescu, <a href="https://arxiv.org/abs/1812.05650">Graphs with few Hamiltonian Cycles</a>, arXiv:1812.05650 [math.CO], 2018-2019. See Table 1 at p. 10. %H A307957 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PlanarGraph.html">Planar Graph</a>. %H A307957 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/UniquelyHamiltonianGraph.html">Uniquely Hamiltonian Graph</a>. %Y A307957 Cf. A307956, A374310, A374311. %K A307957 nonn,more %O A307957 1,4 %A A307957 _Jan Goedgebeur_, May 08 2019