OFFSET
0,1
REFERENCES
Bronstein-Semendjajew, Taschenbuch der Mathematik, 7th German ed. 1965, ch. 4.4.7
LINKS
FORMULA
a(n) = 2^(2n+k) * n! * (n+k)! here for k=2, i.e., Bessel's J2(x).
a(n) - 4*n*(n+2)*a(n-1) = 0. - R. J. Mathar, Jun 20 2013
EXAMPLE
a(2) = 3072 = 64*2*24, J2(x) = x^2/8 - x^4/96 + x^6/3072 - x^8/184320 +- ...
MATHEMATICA
Denominator[Take[CoefficientList[Series[BesselJ[2, x], {x, 0, 30}], x], {3, -1, 2}]] (* Harvey P. Dale, Sep 21 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Previous Mathematica program corrected by Harvey P. Dale, Sep 21 2013
STATUS
approved