A009143 - OEIS

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A009143

Expansion of cosh(sin(tan(x))).

1, 1, 5, 13, -2199, -218311, -20057555, -1933691003, -181405779887, -10159446470927, 2835996855537109, 1885678632476987261, 824453354251620790969, 331368644928193180404521, 128606636719913204236509949 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Cosh[ Sin[ Tan[ x ] ] ] (* Even Part *)`
	CROSSREFS	`Sequence in context: A121228 A201260 A012173 * A127317 A049506 A069524` `Adjacent sequences: A009140 A009141 A009142 * A009144 A009145 A009146`
	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 17 19:13 EST 2012. Contains 206085 sequences.