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 A307935 #9 Feb 16 2025 08:33:55 %S A307935 0,4,120,6912,631680,84211200,15432560640,3722677862400, %T A307935 1143584003358720,435902085306777600,201889940373209088000, %U A307935 111673403387053395148800,72713691524377589317632000,55052849030095232395798118400,47957058157063329359371173888000 %N A307935 Number of (undirected) Hamiltonian paths in the n-cocktail party graph. %H A307935 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/CocktailPartyGraph.html">Cocktail Party Graph</a> %H A307935 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HamiltonianPath.html">Hamiltonian Path</a> %F A307935 a(n) = A007060(n)/2. %Y A307935 Cf. A007060. %K A307935 nonn,easy %O A307935 1,2 %A A307935 _Eric W. Weisstein_, May 06 2019