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 A337642 #30 Sep 20 2020 14:40:28 %S A337642 1,2,3,4,5,6,7,6,7,9,10,11,11,11,14,12,12,15,17,18,18,20,20,20,21,22, %T A337642 24,23,24,25,27,25,23,26,29,32,31,34,39,34,30,36,39,37,39,44,50,42,40, %U A337642 45,46,49,52,50,49,46,46,51,50,54,56,48,48,52,54,59,57,54 %N A337642 Coordination sequence for Even Conant Lattice with respect to origin. %C A337642 See A328078 for more information. The lattice (and therefore the sequence) is infinite, although my illustration for the initial terms shows only the first 10 generations of the construction. %H A337642 Rémy Sigrist, <a href="/A337642/b337642.txt">Table of n, a(n) for n = 0..8787</a> %H A337642 Rémy Sigrist, <a href="/A337642/a337642_1.png">Plots of first 2584 terms (blue), 4744 terms (green), and 8788 terms (red)</a> %H A337642 Rémy Sigrist, <a href="/A337642/a337642.txt">C++ program for A337642</a> %H A337642 N. J. A. Sloane, <a href="/A328078/a328078_5.pdf">The Even Conant Lattice</a> %H A337642 N. J. A. Sloane, <a href="/A337642/a337642.png">Illustration for a(0)-a(16)</a> %H A337642 <a href="/index/Con#coordination_sequences">Index entries for coordination sequences</a> %o A337642 (C++) See Links section. %Y A337642 Cf. A328078, A328080; A233775. %K A337642 nonn %O A337642 0,2 %A A337642 _N. J. A. Sloane_, Sep 18 2020 %E A337642 More terms from _Rémy Sigrist_, Sep 19 2020