A009099 - OEIS

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A009099

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

1, -2, 0, -8, 192, 20480, 1837696, 187743488, 22698672128, 3236847570944, 536307107184640, 101121059849109504, 21095686709291679744, 4655115962946721611776, 983762698552391462027264 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	MATHEMATICA	`Cos[ x ]Cos[ Tan[ x ] ] ( Even Part *)`
	CROSSREFS	`Sequence in context: A101682 A033836 A185159 * A193247 A091041 A140415` `Adjacent sequences: A009096 A009097 A009098 * A009100 A009101 A009102`
	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 February 14 16:29 EST 2012. Contains 205635 sequences.