A009172 - OEIS

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A009172

Expansion of cosh(tanh(x).ln(1+x)).

1, 0, 0, 0, 12, -60, 90, -420, 12320, -124992, 753480, -6481200, 110644776, -1613081184, 18917874976, -250425171360, 4359533351680, -78311204695424, 1329852024578496, -23869209971687040, 483284209880289152 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	MATHEMATICA	`Cosh[ Tanh[ x ]*Log[ 1+x ] ]`
	CROSSREFS	`Sequence in context: A012407 A009093 A012400 * A012405 A012657 A012406` `Adjacent sequences: A009169 A009170 A009171 * A009173 A009174 A009175`
	KEYWORD	`sign,easy`
	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 15 09:26 EST 2012. Contains 205753 sequences.