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 A029696 #18 Jul 24 2021 01:08:58
%S A029696 1,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,22,0,0,64,0,0,0,0,40,0,0,64,44,0,0,0,
%T A029696 0,0,0,0,80,0,0,0,240,0,0,448,0,0,0,0,112,0,0,384,480,0,0,0,0,0,0,0,
%U A029696 220,0,0,0,450,0,0,1408,0,0,0,0,480,0,0,960,812
%N A029696 Theta series of 7-dimensional lattice Kappa_7*.
%D A029696 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 161.
%H A029696 Sean A. Irvine, <a href="/A029696/b029696.txt">Table of n, a(n) for n = 0..1000</a>
%H A029696 Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a029/A029696.java">Java program</a> (github)
%H A029696 G. Nebe and N. J. A. Sloane, <a href="http://www.math.rwth-aachen.de/~Gabriele.Nebe/LATTICES/KAPPAs7.html">Home page for this lattice</a>
%e A029696 G.f. = 1 + 2*q^12 + 22*q^16 + ...
%o A029696 (Magma)
%o A029696 L := Dual(Lattice("Kappa", 7));
%o A029696 B := Basis(ThetaSeriesModularFormSpace(L), 100);
%o A029696 S := [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 22, 0, 0, 64, 0, 0, 0, 0, 40, 64];
%o A029696 Coefficients(&+[B[i] * S[i] : i in [1..26]]); // _Andy Huchala_, Jul 24 2021
%Y A029696 Cf. A015236.
%K A029696 nonn
%O A029696 0,13
%A A029696 _N. J. A. Sloane_
%E A029696 More terms from _Sean A. Irvine_, Mar 02 2020