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 A006911 M5453 #21 Jul 08 2025 16:57:30
%S A006911 1,0,438,1536,9372,15360,57896,70656,211638,215040,582648,529920,
%T A006911 1316472,1139712,2619264,2159616,4815516,3766272,8165550,6259200,
%U A006911 13070328,9799680,20203512,14693376,29739560,21553152,42530424,30369792,59881584,41671680,81197184
%N A006911 Theta series of laminated lattice LAMBDA_11^{max}.
%D A006911 J. H. Conway and N. J. A. Sloane, Laminated lattices, Annals of Math., 116 (1982), pp. 593-620. A revised version appears as Chapter 6 of ``Sphere Packings, Lattices and Groups'' by J. H. Conway and N. J. A. Sloane, Springer-Verlag, NY, 1988.
%D A006911 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag. See Chap. 6.
%D A006911 E. C. Pervin, personal communication.
%D A006911 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A006911 Andy Huchala, <a href="/A006911/b006911.txt">Table of n, a(n) for n = 0..20000</a>
%H A006911 J. H. Conway and N. J. A. Sloane, <a href="/A005135/a005135.png">The "shower" showing containments among the laminated lattices up to dimension 48</a> (Fig 3 from the Annals paper, also Fig. 6.1 in the Sphere packing book).
%o A006911 (Magma)
%o A006911 L := Lattice("Lambda", 11);
%o A006911 B := Basis(ThetaSeriesModularFormSpace(L),20);
%o A006911 Coefficients(B[1] + 438*B[3] + 1536*B[4] + 9372*B[5] + 15360*B[6]); // _Andy Huchala_, Jun 16 2021
%K A006911 nonn
%O A006911 0,3
%A A006911 _N. J. A. Sloane_