%I A002506
%S A002506 8,96,3072,184320,17694720,2477260800,475634073600,119859786547200,
%T A002506 38355131695104000,15188632151261184000,7290543432605368320000,
%U A002506 4170190843450270679040000,2802368246798581896314880000
%N A002506 Denominators of coefficients of expansion of Bessel function J_2(x).
%D A002506 Bronstein-Semendjajew, Taschenbuch der Mathematik, 7th german ed. 1965, 
               ch. 4.4.7
%H A002506 T. D. Noe, <a href="b002506.txt">Table of n, a(n) for n=0..50</a>
%H A002506 <a href="Sindx_Be.html#Bessel">Index entries for sequences related to 
               Bessel functions or polynomials</a>
%F A002506 a(n)= 2^(2n+k) * n! * (n+k)! here for k=2, i.e. Bessel's J2(x)
%e A002506 a(2)= 3072= 64*2*24, J2(x)= x^2/8 -x^4/96 +x^6/3072 -x^8/184320 +-...
%t A002506 Series[ BesselJ[ 2, x ], {x, 0, 30} ]
%Y A002506 J0: A002454, J1: A002474, J3: A014401.
%Y A002506 Sequence in context: A002168 A114425 A052127 this_sequence A083182 A116267 
               A116130
%Y A002506 Adjacent sequences: A002503 A002504 A002505 this_sequence A002507 A002508 
               A002509
%K A002506 nonn
%O A002506 0,1
%A A002506 N. J. A. Sloane (njas(AT)research.att.com).