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 A357003 #8 Sep 17 2022 09:53:54 %S A357003 0,0,1,0,1,1,6,0,1,0,6,1,6,6,72,0,1,1,8,1,8,8,156,1,8,8,156,8,156,156, %T A357003 1440,0,1,0,8,0,12,12,335,0,12,0,300,12,352,300,4800,1,8,12,335,12, %U A357003 300,352,4800,8,335,300,4800,335,4800,4800,43200,0,1,1,10,1 %N A357003 Number of Hamiltonian cycles in the cyclic Haar graph with index n. %C A357003 a(n) > 0 for all odd n >= 3 (Hladnik, Marušič, and Pisanski, 2002). %H A357003 Pontus von Brömssen, <a href="/A357003/b357003.txt">Table of n, a(n) for n = 1..2047</a> %H A357003 Milan Hladnik, Dragan Marušič, and Tomaž Pisanski, <a href="https://doi.org/10.1016/S0012-365X(01)00064-4">Cyclic Haar graphs</a>, Discrete Mathematics 244 (2002), 137-152. %H A357003 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HaarGraph.html">Haar Graph</a>. %F A357003 a(2^k-1) = A010796(k-1) for k >= 2. %F A357003 a(A291165(n)) = 0. %F A357003 a(n) = a(A357004(n)). %Y A357003 Cf. A010796, A291165, A357000, A357004. %K A357003 nonn %O A357003 1,7 %A A357003 _Pontus von Brömssen_, Sep 08 2022