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A013517 Denominator of [x^(2n+1)] in the Taylor expansion sin(cosec(x)-cot(x))= x/2 + x^3/48 - x^5/1280 - 55*x^7/129024 - 143*x^9/1769472 + ... 0
2, 48, 1280, 129024, 1769472, 81749606400, 4637432217600, 3296144130048000, 46620662575398912000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Numerators are apparently provided by A096664.

LINKS

Table of n, a(n) for n=0..8.

EXAMPLE

sin(cosec(x)-cot(x)) = x/(2^1*1!) + x^3/(2^3*3!) -3*x^5/(2^5*5!) -275*x^7/(2^7*7!) -15015*x^9/(2^9*9!) -968167*x^11/(2^11*11!) +... (apparently covered by A003706)

CROSSREFS

Sequence in context: A012803 A135394 A010046 * A027509 A186284 A119695

Adjacent sequences:  A013514 A013515 A013516 * A013518 A013519 A013520

KEYWORD

sign,frac

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

EXTENSIONS

Corrected by R. J. Mathar, Dec 18 2011

STATUS

approved

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Last modified June 25 06:13 EDT 2017. Contains 288709 sequences.