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 A065536 #13 Feb 22 2021 07:45:42 %S A065536 1,2,3,6,9,21 %N A065536 Number of strongly eutactic lattices in dimension n. %D A065536 J. Martinet, Les reseaux parfaits des espaces Euclidiens, Masson, Paris, 1996. %D A065536 J. Martinet, Perfect Lattices in Euclidean Spaces, Springer-Verlag, NY, 2003. %D A065536 G. Nebe, Review of J. Martinet, Perfect Lattices in Euclidean Spaces, Bull. Amer. Math. Soc., 41 (No. 4, 2004), 529-533. %H A065536 Christian Batut and Jacques Martinet, <a href="http://jamartin.perso.math.cnrs.fr/Lattices/webdesign.pdf">Lattices and spherical designs</a>, 2005-2014. See pages 12-13. %H A065536 J. Martinet and B. Venkov, <a href="https://jamartin.perso.math.cnrs.fr/Publications/fOrteutensmath.pdf">Les réseaux fortement eutactiques</a>, pp. 112-132 in Réseaux Euclidiens, Designs Sphériques et Formes Modulaires, ed. J. Martinet, L'Enseignement Mathématique, Geneva, 2001. %Y A065536 Cf. A037075, A065535, A004026. %K A065536 nonn,nice,hard,more %O A065536 1,2 %A A065536 _N. J. A. Sloane_, Nov 16 2001 %E A065536 It is known that a(6) >= 19, a(7) >= 10. %E A065536 a(5) corrected and a(6) added from Batut & Martinet by _Andrey Zabolotskiy_, Feb 20 2021