A009770 - OEIS

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A009770

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

0, 1, -2, 5, -11, -16, 656, -9066, 107766, -1222110, 13400544, -137979810, 1199045706, -4684987308, -153270916044, 6326220565560, -169975260810216, 3943603406845656, -83676044951653392, 1624994111075924376 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Tanh[ Log[ 1+Log[ 1+x ] ] ]`
	CROSSREFS	`Sequence in context: A024917 A081402 A118660 * A132121 A070957 A166744` `Adjacent sequences: A009767 A009768 A009769 * A009771 A009772 A009773`
	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 19:13 EST 2012. Contains 206085 sequences.