id:A024249 - OEIS Search Results

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Expansion of tanh(tan(x))*tan(x)/2.

+0
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0, 1, 4, 24, 192, 9472, 1182208, 135668736, 14993473536, 1702145425408, 212302947942400, 32402586267549696, 6715751146400514048, 1845064263947813650432, 597912413872386432040960 (list; graph; listen)

	OFFSET	`0,3`
	MATHEMATICA	`Tanh[ Tan[ x ] ]Tan[ x ]/2 ( Even Part *)`
	CROSSREFS	`A009812.` `Sequence in context: A036691 A002866 A073840 this_sequence A007145 A101370 A099021` `Adjacent sequences: A024246 A024247 A024248 this_sequence A024250 A024251 A024252`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended and signs tested 03/97.`

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

AT&T Labs Research