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A013534 Numerator of [x^(2n)] in the Taylor expansion cos(cosec(x)-cosech(x))= 1 -x^2/18 +x^4/1944 -5029*x^6/3674160 +6697*x^8/264539520 -... 0
1, -1, 1, -5029, 6697, -375719873, 186044689, -1770350411, 102625697881591, -15912188224095499151, 1419184560088744177499, -323645955378411578735051, 935339682040604214800761, -36813244507954712597112169117, 45816041290074218754101655557981 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

COMMENTS

Essentially a bisection of A013529.

CROSSREFS

Cf. A068917.

Sequence in context: A201178 A112139 A188241 * A111030 A068378 A036458

Adjacent sequences:  A013531 A013532 A013533 * A013535 A013536 A013537

KEYWORD

sign,frac

AUTHOR

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

EXTENSIONS

Values replaced by Numerators. - R. J. Mathar, Dec 20 2011

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Last modified February 15 11:14 EST 2012. Contains 205763 sequences.