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 A076322 #27 Feb 16 2025 08:32:47
%S A076322 1,1,2,5,17,81,519,5218,81677,2014360,76140741,4303246908
%N A076322 Number of connected 3-colorable (i.e., chromatic number <= 3) simple graphs on n nodes.
%H A076322 Maria Chudnovsky, Jan Goedgebeur, Oliver Schaudt, Mingxian Zhong, <a href="http://arxiv.org/abs/1504.06979">Obstructions for three-coloring graphs without induced paths on six vertices</a>, arXiv preprint, arXiv:1504.06979 [math.CO], 2015-2018.
%H A076322 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/n-ColorableGraph.html">n-Colorable Graph</a>
%F A076322 Inverse Euler transform of A076315. - _Andrew Howroyd_, Dec 02 2018
%t A076322 A076315 = Cases[Import["https://oeis.org/A076315/b076315.txt", "Table"], {_, _}][[All, 2]];
%t A076322 (* EulerInvTransform is defined in A022562 *)
%t A076322 EulerInvTransform[A076315] (* _Jean-François Alcover_, Sep 25 2019, updated Mar 17 2020 *)
%Y A076322 Cf. A005142, A076323, A076324, A076325, A076326, A076327, A076328.
%Y A076322 Cf. A076279, A076315, A084269, A126737.
%K A076322 nonn,more
%O A076322 1,3
%A A076322 _Eric W. Weisstein_, Oct 06 2002
%E A076322 a(10)-a(11) from _Andrew Howroyd_, Dec 02 2018
%E A076322 a(12) from _Jinyuan Wang_, Feb 23 2020