A009788 - OEIS

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A009788

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

0, 1, -3, 6, 12, -325, 3275, -21238, 2128, 2873229, -59980543, 767451894, -4032383300, -119489497257, 4880007568319, -104393287284518, 1240478290057792, 10284007879438201, -1108679036024621403, 37101253954089817798 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Tanh[ Log[ 1+x ]/Exp[ x ] ]`
	CROSSREFS	`Sequence in context: A085866 A139416 A013563 * A102966 A189420 A145604` `Adjacent sequences: A009785 A009786 A009787 * A009789 A009790 A009791`
	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.