id:A009118 - OEIS Search Results

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Expansion of cos(x/cos(x)).

+0
2

1, -1, -11, -181, -3863, -66121, 4478365, 1211701763, 226423491793, 43068302925551, 8876725117679941, 1997577117130009403, 483811389670392875449, 121594250947356501211559, 28960468994349845642813677 (list; graph; listen)

	OFFSET	`0,3`
	MATHEMATICA	`Cos[ x/Cos[ x ] ] (* Even Part *)`
	CROSSREFS	`Sequence in context: A020456 A036935 A143413 this_sequence A112943 A057618 A068648` `Adjacent sequences: A009115 A009116 A009117 this_sequence A009119 A009120 A009121`
	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 December 11 12:57 EST 2009. Contains 170656 sequences.

AT&T Labs Research