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 A290009 #16 Feb 26 2018 10:18:35
%S A290009 691,563040,305307360,131729109120,34085393629920,4587384326495040,
%T A290009 302027782271806080,10484303481804821760,226150164335242994400,
%U A290009 3395290157453914541280,38308806132696980919360,343030311387007824977280,2537869275676057371269760
%N A290009 Coefficients in expansion of 691*E_4*E_8*E_12.
%H A290009 Seiichi Manyama, <a href="/A290009/b290009.txt">Table of n, a(n) for n = 0..1000</a>
%F A290009 G.f.: 691*E_4^3*E_12.
%t A290009 terms = 13;
%t A290009 E4[x_] = 1 + 240*Sum[k^3*x^k/(1 - x^k), {k, 1, terms}];
%t A290009 E12[x_] = 1 + (65520/691)*Sum[k^11*x^k/(1 - x^k), {k, 1, terms}];
%t A290009 691*E4[x]^3*E12[x] + O[x]^terms // CoefficientList[#, x]& (* _Jean-François Alcover_, Feb 26 2018 *)
%Y A290009 Cf. A004009 (E_4), A008410 (E_8), A008411 (E_4^3), A029828 (691*E_12).
%Y A290009 Cf. A290010.
%K A290009 nonn
%O A290009 0,1
%A A290009 _Seiichi Manyama_, Jul 17 2017