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 A085408 #13 Feb 16 2025 08:32:50
%S A085408 0,1,28,14704,51109385408
%N A085408 Total number of cycles in the binary n-cube.
%D A085408 Computed by Daniele Degiorgi (danieled(AT)INF.ETHZ.CH).
%H A085408 Richard H. Hammack, Paul C. Kainen, <a href="https://doi.org/10.1007/s00373-018-1891-y">Graph Bases and Diagram Commutativity</a>, Graphs and Combinatorics (2018), Vol. 34, Issue 4, 523-534.
%H A085408 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GraphCycle.html">Graph Cycle</a>
%H A085408 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HypercubeGraph.html">Hypercube Graph</a>
%t A085408 Table[Total[Table[Length[FindCycle[HypercubeGraph[n], {k}, All]], {k, 4, 2^n, 2}]], {n, 4}] (* _Eric W. Weisstein_, Mar 24 2020 *)
%Y A085408 Cf. A066037, A001788. Row sums of A085452.
%K A085408 nonn,hard,more
%O A085408 1,3
%A A085408 Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 12 2003