id:A009750 - OEIS Search Results

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

+0
2

0, 2, 24, 688, 36992, 3234304, 418499584, 75077748736, 17816420974592, 5399699170000896, 2034070241589854208, 932012713402719797248, 510363278595553899839488, 329128604050609873851777024 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`Tan[ x ]Tan[ Tan[ x ] ] ( Even Part *)`
	CROSSREFS	`Sequence in context: A012118 A012375 A012750 this_sequence A030438 A012723 A069150` `Adjacent sequences: A009747 A009748 A009749 this_sequence A009751 A009752 A009753`
	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 17 13:29 EST 2009. Contains 170826 sequences.

AT&T Labs Research