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A091197 Denominators of Taylor series expansion of 3*sin(2*x)/(2*(2+cos(2*x))) (with 0's omitted). 1

%I

%S 1,1,45,189,405,31185,1658475,4209975,97692469875,65511420975,

%T 4396161144375,1613742832877175,1447106344699640625,

%U 316985199315159375,790515124238106783140625,845033408668321044046875,1693960980510228821015625,84913182070036240111050234375

%N Denominators of Taylor series expansion of 3*sin(2*x)/(2*(2+cos(2*x))) (with 0's omitted).

%D G. H. Hardy, A Course of Pure Mathematics, 9th ed., 1944, p. 291.

%H G. H. Hardy, <a href="http://www.hti.umich.edu/cgi/t/text/text-idx?sid=b88432273f115fb346725f1a42422e19;c=umhistmath;idno=ACM1516.0001.001">A Course of Pure Mathematics</a>, Cambridge, The University Press, 1908.

%e 3*sin(2*x)/(2*(2+cos(2*x))) = x-4/45*x^5-8/189*x^7-4/405*x^9+8/31185*x^11+...

%Y Cf. A091198.

%K nonn,frac

%O 0,3

%A _N. J. A. Sloane_, Feb 23 2004

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Last modified September 20 01:11 EDT 2020. Contains 337228 sequences. (Running on oeis4.)