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 A130315 #31 Feb 16 2025 08:33:06 %S A130315 0,0,0,0,1,0,0,0,2,6,20,38,280,2900,28399,293059,3833587,60167732 %N A130315 Number of nontrivial (girth >=5) snarks on 2n nodes. %C A130315 Snarks are cyclically 4-edge connected cubic graphs with chromatic index 4 and girth >= 5. %H A130315 G. Brinkmann, J. Goedgebeur, J. Hagglund, and K. Markstrom, <a href="http://arxiv.org/abs/1206.6690">Generation and properties of Snarks</a>, arxiv 1206.6690 [math.CO], 2012-2013. %H A130315 G. Brinkmann, J. Goedgebeur, J. Hagglund, and K. Markstrom, <a href="https://doi.org/10.1016/j.jctb.2013.05.001">Generation and properties of Snarks</a>, J. Comb. Theory, Series B, 103 (4) (2013), 468-488. %H A130315 J. Hagglund and K. Markstrom, <a href="https://doi.org/10.1016/j.disc.2011.08.024">On stable cycles and cycle double covers of graphs with large circumference</a>, Discrete Math., 312 (2012), 2540-2544. %H A130315 House of Graphs, <a href="https://houseofgraphs.org/meta-directory/snarks">Snarks</a> %H A130315 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Snark.html">Snark</a> %K A130315 nonn,hard,more %O A130315 1,9 %A A130315 _Eric W. Weisstein_, May 22 2007 %E A130315 a(15), a(16) added from Hagglund-Markstrom by _N. J. A. Sloane_, Jul 26 2012 %E A130315 a(17), a(18) added by _Jan Goedgebeur_, Jul 31 2012