A009415 - OEIS

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A009415

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

0, 1, -1, 5, -12, 9, -105, 1413, -8176, 42801, -442665, 5165445, -54556524, 637139385, -8293744641, 113478922053, -1717525727040, 28284932778977, -475222905120177, 8340834063368709, -159725733100784940, 3244894614657423849 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	MATHEMATICA	`Log[ 1+x ]*Cosh[ Tanh[ x ] ]`
	CROSSREFS	`Sequence in context: A070368 A066326 A015242 * A195031 A076537 A110134` `Adjacent sequences: A009412 A009413 A009414 * A009416 A009417 A009418`
	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 02:50 EST 2012. Contains 205694 sequences.