id:A009707 - OEIS Search Results

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Expansion of tan(tan(x).x).

+0
2

0, 2, 8, 336, 15616, 1450240, 185032704, 33566984192, 7971973332992, 2424984197529600, 915532582868746240, 420569934453637906432, 230845747512083447021568, 149228982402223336708898816 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`Tan[ Tan[ x ]x ] ( Even Part *)`
	CROSSREFS	`Sequence in context: A013135 A012999 A013003 this_sequence A013176 A009489 A102597` `Adjacent sequences: A009704 A009705 A009706 this_sequence A009708 A009709 A009710`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended and signs tested Mar 15 1997 by Olivier Gerard.`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research