A068110 Denominators of coefficients in J0(i*sqrt(x))^2 power series where J0 denotes the ordinary Bessel function of order 0.

1, 2, 32, 576, 73728, 409600, 176947200, 17340825600, 1183800360960, 1725980926279680, 3451961852559360000, 39779750872350720000, 137478819014844088320000, 1858713633080692074086400

Offset

0,2

References

Bruce Berndt, Ramanujan's Notebooks Part II, Springer-Verlag; see Hypergeometric series, p. 59.

Links

Table of n, a(n) for n=0..13.

Formula

J0(i*sqrt(x))^2=sum(n>=0, (2n)!/(n!)^4/2^(2n)*x^n)

Crossrefs

Cf. A068111.

Sequence in context: A052151 A092844 A038394 * A304860 A198599 A009517

Adjacent sequences: A068107 A068108 A068109 * A068111 A068112 A068113

Keyword

easy,frac,nonn

Author

Benoit Cloitre, Mar 21 2002

Status

approved