A009402 - OEIS

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A009402

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

0, 1, -3, 9, -42, 285, -2358, 23079, -264792, 3479625, -51399978, 843354699, -15223184892, 299785177965, -6395410234398, 146929245609519, -3616700960240592, 94961188049020305, -2649161419533345618 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Log[ 1+Tanh[ x ]/Exp[ x ] ]`
	CROSSREFS	`Sequence in context: A018965 A018995 A105804 * A009584 A013562 A081681` `Adjacent sequences: A009399 A009400 A009401 * A009403 A009404 A009405`
	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 13:43 EST 2012. Contains 205804 sequences.