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 A307936 #7 Feb 16 2025 08:33:55 %S A307936 3,120,18792,7547904,6210432000,9116955648000,21746167511040000, %T A307936 78775578609057792000,411821286886186942464000, %U A307936 2985318922218593845248000000,29060162328471184917135360000000,369984034079871408445744742400000000 %N A307936 Numbers of (undirected) Hamiltonian paths in the complete tripartite graph K_{n,n,n}. %H A307936 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/CompleteTripartiteGraph.html">Complete Tripartite Graph</a> %H A307936 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HamiltonianPath.html">Hamiltonian Path</a> %F A307936 a(n) = A234633(n)/2. %Y A307936 Cf. A234633. %K A307936 nonn %O A307936 1,1 %A A307936 _Eric W. Weisstein_, May 06 2019