A024279 - OEIS

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A024279

Expansion of tan(tan(x)*sinh(x))/2.

0, 1, 6, 191, 11676, 1111501, 159118146, 31534949291, 8253261002616, 2758076443359961, 1145356666834820286, 578481632054752663511, 349162848547458172567956, 248194708790049332718453541 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,3`
	LINKS	`Table of n, a(n) for n=0..13.`
	MATHEMATICA	`With[{nn=30}, Take[CoefficientList[Series[Tan[Tan[x]Sinh[x]]/2, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] ( Harvey P. Dale, Aug 12 2019 *)`
	CROSSREFS	`A009706.` `Sequence in context: A129046 A222016 A059491 * A350873 A182788 A232214` `Adjacent sequences: A024276 A024277 A024278 * A024280 A024281 A024282`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin`
	EXTENSIONS	`Extended and signs tested 03/97.` `Previous Mathematica program replaced by Harvey P. Dale, Aug 12 2019`
	STATUS	`approved`

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Last modified December 11 07:17 EST 2023. Contains 367717 sequences. (Running on oeis4.)