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 A307956 #30 Feb 16 2025 08:33:55 %S A307956 0,0,1,2,3,12,49,482,6380,135252,3939509,166800470,9739584172, %T A307956 818717312364,95353226103276 %N A307956 Number of graphs of order n with exactly one Hamiltonian cycle. %H A307956 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 4 at p. 23. %H A307956 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/UniquelyHamiltonianGraph.html">Uniquely Hamiltonian Graph</a>. %Y A307956 Cf. A307957, A374312, A374313, A374314, A374315, A374316. %K A307956 nonn,more %O A307956 1,4 %A A307956 _Jan Goedgebeur_, May 08 2019