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 A288472 #27 Feb 26 2018 10:18:29 %S A288472 1,-82104,-181275671592,1327007921039904,16726528971891002133912, %T A288472 -212292443057353273999454544,-1528649681810950691089095375538848, %U A288472 27164473060529924968213209402868250688,139687438912977894660348148674573721130447640 %N A288472 Numerators of coefficients in expansion of E_14/E_12. %H A288472 Seiichi Manyama, <a href="/A288472/b288472.txt">Table of n, a(n) for n = 0..182</a> %e A288472 E_14/E_12 = 1 - 82104/691 * q - 181275671592/477481 * q^2 + 1327007921039904/329939371 * q^3 + 16726528971891002133912/227988105361 * q^4 + ... . %t A288472 terms = 9; %t A288472 E14[x_] = 1 - 24*Sum[k^13*x^k/(1 - x^k), {k, 1, terms}]; %t A288472 E12[x_] = 1 + (65520/691)*Sum[k^11*x^k/(1 - x^k), {k, 1, terms}]; %t A288472 E14[x]/E12[x] + O[x]^terms // CoefficientList[#, x]& // Numerator (* _Jean-François Alcover_, Feb 26 2018 *) %Y A288472 Cf. A288989 (denominators). %Y A288472 Cf. A029828, A058550 (E_14). %K A288472 sign,frac %O A288472 0,2 %A A288472 _Seiichi Manyama_, Jun 21 2017