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 A061404 #11 Aug 16 2017 04:10:06
%S A061404 3840,92160,5160960,495452160,71345111040,14269022208000,
%T A061404 3767021862912000,1265719345938432000,526539247910387712000,
%U A061404 265375780946835406848000,159225468568101244108800000
%N A061404 Denominators in the series for Bessel function J5(x).
%H A061404 G. C. Greubel, <a href="/A061404/b061404.txt">Table of n, a(n) for n = 0..220</a> (terms 0..50 from T. D. Noe)
%H A061404 <a href="/index/Be#Bessel">Index entries for sequences related to Bessel functions or polynomials</a>
%t A061404 Denominator[Take[CoefficientList[Series[BesselJ[5, x], {x, 0, 500}], x], {6, -1, 2}]] (* _G. C. Greubel_, Aug 15 2017 *)
%Y A061404 J1: A002474, J2: A002506, J3: A014401 for formula etc.
%K A061404 nonn,easy
%O A061404 0,1
%A A061404 _Frank Ellermann_, Jun 11 2001