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 A308586 #8 Feb 16 2025 08:33:55 %S A308586 0,72,2480304,27746717207772000 %N A308586 Number of (undirected) Hamiltonian paths on the n X n X n grid graph. %H A308586 R. D. Schram, H. Schiessel, <a href="https://dx.doi.org/10.1088/1751-8113/49/36/369501">Corrigendum: exact enumeration of Hamiltonian walks on the 4x4x4 cube and applications to protein folding</a>, J. Phys. A: Math. Theor. 46 (2013) 485001. %H A308586 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GridGraph.html">Grid Graph</a> %H A308586 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HamiltonianPath.html">Hamiltonian Path</a> %F A308586 a(n) = A193346(n)/2. %Y A308586 Cf. A193346 (directed Hamiltonian paths). %K A308586 nonn,hard,more %O A308586 1,2 %A A308586 _Eric W. Weisstein_, Jun 09 2019