A009748 - OEIS

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A009748

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

0, 2, 12, 118, 1880, 63274, 4010212, 332200222, 32100167600, 3749943333714, 559340287979196, 106082041802123974, 24279253761809428744, 6438550081937270152314, 1958379738778789723419028 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	MATHEMATICA	`Tan[ x ]Tan[ Sin[ x ] ] ( Even Part *)`
	CROSSREFS	`Sequence in context: A121425 A132692 A009546 * A095717 A089431 A119701` `Adjacent sequences: A009745 A009746 A009747 * A009749 A009750 A009751`
	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 February 13 16:40 EST 2012. Contains 205523 sequences.