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 A008448 #12 Jul 08 2025 01:04:14
%S A008448 1,72,756,2184,5742,10584,19656,26712,49140,59208,88452,111888,159432,
%T A008448 171864,260064,275184,364734,412776,532872,534744,772632,751296,
%U A008448 935064,1022112,1277640,1229328,1661688,1598856,1959696,2048760,2476656,2321928
%N A008448 Theta series of A_8 lattice.
%D A008448 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 110.
%t A008448 terms = 26; f[q_] = LatticeData["A8", "ThetaSeriesFunction"][-I Log[q]/Pi]; Series[f[q], {q, 0, 2 terms - 1}] // CoefficientList[#, q]& // Round // DeleteCases[#, 0]& (* _Jean-François Alcover_, Jul 04 2017 *)
%K A008448 nonn
%O A008448 0,2
%A A008448 _N. J. A. Sloane_
%E A008448 More terms from _Sean A. Irvine_, Jun 12 2019