A009159 - OEIS

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A009159

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

1, 0, 4, 56, 1744, 86208, 6199744, 608357504, 77889982720, 12588540708864, 2503565961032704, 600347512023062528, 170721835772956659712, 56780394898390577528832, 21828678118361789793746944 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Cosh[ Tan[ x ] ]Cos[ x ] ( Even Part *)`
	CROSSREFS	`Sequence in context: A174489 A009563 A111849 * A013055 A012983 A012959` `Adjacent sequences: A009156 A009157 A009158 * A009160 A009161 A009162`
	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 14:07 EST 2012. Contains 205623 sequences.