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 A283825 #20 Feb 16 2025 08:33:43 %S A283825 1,0,1,2,2,5,4,17,22,165,538,18972,389426,50314715 %N A283825 Number of Hamiltonian regular graphs on n nodes. %C A283825 By convention, the singleton graph is generally considered to be both regular (cf. A005176) and Hamiltonian (cf. A003216). - _Eric W. Weisstein_, Oct 30 2017 %H A283825 F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties. %H A283825 Peter Steinbach, <a href="/A000088/a000088_17.pdf">Field Guide to Simple Graphs, Volume 1</a>, Part 17 (For Volumes 1, 2, 3, 4 of this book see A000088, A008406, A000055, A000664, respectively.) %H A283825 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HamiltonianGraph.html">Hamiltonian Graph</a> %H A283825 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/LCFNotation.html">LCF Notation</a> %H A283825 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/RegularGraph.html">Regular Graph</a> %Y A283825 Cf. A005176, A005177. %K A283825 nonn,more %O A283825 1,4 %A A283825 _N. J. A. Sloane_, Mar 19 2017 %E A283825 a(11)-a(14) added using tinygraph by _Falk Hüffner_, Mar 31 2017 %E A283825 a(1) changed from 0 to 1 by _Eric W. Weisstein_, Oct 30 2017