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 A015678 #11 Oct 23 2018 07:11:13
%S A015678 1,23,483,9177,156561,2398095,33725475,465686865,6952917825,
%T A015678 114751084455,1935277553475,32136707104425,567545846123025,
%U A015678 11263156788858975,229832929643191875,4560180147352454625
%N A015678 Expansion of e.g.f. theta_3^(23/2).
%D A015678 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 102.
%H A015678 Seiichi Manyama, <a href="/A015678/b015678.txt">Table of n, a(n) for n = 0..444</a>
%t A015678 nmax = 25; CoefficientList[Series[EllipticTheta[3, 0, x]^(23/2), {x, 0, nmax}], x] * Range[0, nmax]! (* _Vaclav Kotesovec_, Oct 23 2018 *)
%K A015678 nonn
%O A015678 0,2
%A A015678 _N. J. A. Sloane_