A009055 - OEIS

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A009055

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

1, -1, -11, -253, -9463, -491609, -30257347, -1480493589, 177416283793, 125705754161615, 53738108098148101, 22477151211215445843, 9977406312993326490265, 4802660699035958910256759 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Cos[ Sinh[ Tan[ x ] ] ] (* Even Part *)`
	CROSSREFS	`Sequence in context: A190680 A089298 A012154 * A009067 A128683 A177912` `Adjacent sequences: A009052 A009053 A009054 * A009056 A009057 A009058`
	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 15 11:25 EST 2012. Contains 205777 sequences.