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 A234635 #16 Jun 15 2025 20:47:21 %S A234635 6,24,1104,13957632,859428866274361344, %T A234635 1736323895937560083755071573748292907445157625856 %N A234635 Numbers of directed Hamiltonian paths in the n-Sierpinski gasket graph. %C A234635 Explicit formula and asymptotic are given by Chang and Chen (2011). %C A234635 a(7) contains 137 decimal digits. %H A234635 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HamiltonianPath.html">Hamiltonian Path</a>. %H A234635 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SierpinskiGasketGraph.html">Sierpinski Gasket Graph</a>. %H A234635 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> %F A234635 a(n) = A246957(n)*2. %Y A234635 Cf. A246957, A246958, A246959. %K A234635 nonn %O A234635 1,1 %A A234635 _Eric W. Weisstein_, Dec 28 2013 %E A234635 a(5)-a(6) added by _Max Alekseyev_, Sep 08 2014