A009811 - OEIS

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A009811

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

0, 2, -4, -42, -456, 10154, 1263668, 74121726, 1582556016, -396499390126, -87145255604884, -10528569148387290, -379538283994219608, 201132350259244110074, 52827499211277672807332 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	MATHEMATICA	`Tanh[ Tan[ x ] ]Sin[ x ] ( Even Part *)`
	CROSSREFS	`Sequence in context: A103105 A018312 A009547 * A009591 A009717 A018317` `Adjacent sequences: A009808 A009809 A009810 * A009812 A009813 A009814`
	KEYWORD	`sign`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.