A009182 - OEIS

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A009182

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

1, 2, 20, 608, 34320, 3084640, 405224896, 73292662784, 17468683774208, 5306511481924096, 2001393333656871936, 917626310129679884288, 502654675782900203720704, 324215069803278031144280064 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	MATHEMATICA	`Cosh[ x ]/Cos[ Tan[ x ] ] (* Even Part *)`
	CROSSREFS	`Sequence in context: A157317 A009399 A197743 * A015207 A054941 A012495` `Adjacent sequences: A009179 A009180 A009181 * A009183 A009184 A009185`
	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 14 09:42 EST 2012. Contains 205614 sequences.