id:A009277 - OEIS Search Results

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Expansion of exp(tanh(x)^2).

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1, 2, -4, -88, 4496, -155488, 675776, 903834752, -178181918464, 26154843525632, -2632795710260224, -207121926659381248, 274561534481040183296, -132684091405061956722688, 50873850498309673207709696 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`Exp[ Tanh[ x ]^2 ] (* Even Part *)`
	CROSSREFS	`Sequence in context: A015170 A013146 A116310 this_sequence A018410 A156496 A007534` `Adjacent sequences: A009274 A009275 A009276 this_sequence A009278 A009279 A009280`
	KEYWORD	`sign`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research