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 A246957 #17 Feb 16 2025 08:33:23 %S A246957 3,12,552,6978816,429714433137180672, %T A246957 868161947968780041877535786874146453722578812928 %N A246957 Numbers of (undirected) Hamiltonian paths in the n-Sierpiński gasket graph. %C A246957 Explicit formula and asymptotic are given by Chang and Chen (2011). %C A246957 a(7) contains 137 decimal digits. %H A246957 S.-C. Chang, L.-C. Chen. Hamiltonian walks on the Sierpinski gasket, J. Math. Phys. 52 (2011), 023301. doi:<a href="http://dx.doi.org/10.1063/1.3545358">10.1063/1.3545358</a>. arXiv:<a href="http://arxiv.org/abs/0909.5541">0909.5541</a>. %H A246957 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HamiltonianPath.html">Hamiltonian Path</a>. %H A246957 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SierpinskiGasketGraph.html">Sierpiński Gasket Graph</a>. %Y A246957 Cf. A234635, A246958, A246959. %K A246957 nonn %O A246957 1,1 %A A246957 _Max Alekseyev_, Sep 08 2014