A009423 - OEIS

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A009423

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

0, 0, 2, -6, 14, -40, 204, -1316, 8728, -65472, 587520, -5909024, 63996096, -755614080, 9771577984, -136347987712, 2032096826880, -32315254874112, 547193693896704, -9816654494863360, 185846783267553280, -3704632705419493376 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Log[ 1+x ]*Log[ 1+Tanh[ x ] ]`
	CROSSREFS	`Sequence in context: A192484 A188492 A151538 * A008325 A004066 A123383` `Adjacent sequences: A009420 A009421 A009422 * A009424 A009425 A009426`
	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 17 00:09 EST 2012. Contains 205978 sequences.