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 A061405 #11 Aug 16 2017 04:10:13
%S A061405 46080,1290240,82575360,8918138880,1426902220800,313918488576000,
%T A061405 90408524709888000,32908702994399232000,14743098941490855936000,
%U A061405 7961273428405062205440000,5095214994179239811481600000
%N A061405 Denominators in the series for Bessel function J6(x).
%H A061405 G. C. Greubel, <a href="/A061405/b061405.txt">Table of n, a(n) for n = 0..220</a> (terms 0..50 from T. D. Noe)
%H A061405 <a href="/index/Be#Bessel">Index entries for sequences related to Bessel functions or polynomials</a>
%t A061405 Denominator[Take[CoefficientList[Series[BesselJ[6, x], {x, 0, 500}], x], {7, -1, 2}]] (* _G. C. Greubel_, Aug 15 2017 *)
%Y A061405 J1: A002474, J2: A002506, J3: A014401 for formula etc.
%K A061405 nonn,easy
%O A061405 0,1
%A A061405 _Frank Ellermann_, Jun 11 2001