id:A009718 - OEIS Search Results

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Expansion of tan(tanh(x)).x.

+0
2

0, 2, 0, -48, 896, -1280, -1317888, 113985536, -5662048256, -173996310528, 103038851481600, -18151624725757952, 1834297840675848192, 53334014587534573568, -66117477689491873333248 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`Tan[ Tanh[ x ] ]x ( Even Part *)`
	CROSSREFS	`Adjacent sequences: A009715 A009716 A009717 this_sequence A009719 A009720 A009721` `Sequence in context: A012450 A097173 A009493 this_sequence A012420 A012694 A098276`
	KEYWORD	`sign`
	AUTHOR	`R. H. Hardin (rhh(AT)cadence.com)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

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Last modified May 16 01:24 EDT 2008. Contains 139630 sequences.

AT&T Labs Research