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 A015696 #13 Oct 23 2018 08:15:45
%S A015696 1,-23,575,-15525,449673,-13887975,454991175,-15742117125,
%T A015696 573015200625,-21871632491415,872889859083375,-36333045693685125,
%U A015696 1573742270610365625,-70792055252958414375,3301204645547137704375,-159327445416522130873125
%N A015696 Expansion of e.g.f. theta_3^(-23/2).
%D A015696 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 102.
%H A015696 Seiichi Manyama, <a href="/A015696/b015696.txt">Table of n, a(n) for n = 0..418</a>
%t A015696 nmax = 25; CoefficientList[Series[EllipticTheta[3, 0, x]^(-23/2), {x, 0, nmax}], x] * Range[0, nmax]! (* _Vaclav Kotesovec_, Oct 23 2018 *)
%K A015696 sign
%O A015696 0,2
%A A015696 _N. J. A. Sloane_