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 A015697 #11 Oct 23 2018 07:20:12
%S A015697 1,-25,675,-19575,606225,-19944225,693835875,-25422933375,
%T A015697 977745218625,-39350424479625,1652904664495875,-72294275991774375,
%U A015697 3285576793503860625,-154866859897225100625,7558086937740656191875,-381335852895175582779375
%N A015697 Expansion of e.g.f. theta_3^(-25/2).
%D A015697 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 102.
%H A015697 Seiichi Manyama, <a href="/A015697/b015697.txt">Table of n, a(n) for n = 0..416</a>
%t A015697 nmax = 25; CoefficientList[Series[EllipticTheta[3, 0, x]^(-25/2), {x, 0, nmax}], x] * Range[0, nmax]! (* _Vaclav Kotesovec_, Oct 23 2018 *)
%Y A015697 Cf. A015679.
%K A015697 sign
%O A015697 0,2
%A A015697 _N. J. A. Sloane_