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 A307760 #13 Apr 29 2019 21:14:07 %S A307760 0,29354332817,1292515672236611166229929, %T A307760 56911411397043798759062515920346474052, %U A307760 2505895144465774474827581824222076409739506505294889,110338336739674093788639219775047689525384763850603917156033805525 %N A307760 a(n) = (A288840(5*n) - A288840(n))/3000. %H A307760 Seiichi Manyama, <a href="/A307760/b307760.txt">Table of n, a(n) for n = 0..73</a> %H A307760 MathOverflow, <a href="https://mathoverflow.net/questions/272928/">Properties of coefficients in expansion of E6/E4 and E8/E6</a> %Y A307760 Cf. A008410 (E_8), A013973 (E_6), A288840, A307759. %K A307760 nonn %O A307760 0,2 %A A307760 _Seiichi Manyama_, Apr 26 2019