A009167 - OEIS

This site is supported by donations to The OEIS Foundation.

A009167

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

1, 1, 21, 717, 38857, 3158329, 363525789, 56250039237, 11210469917713, 2783865475754737, 840008000833503141, 302092032859131150141, 127513257396264637784281, 62381091849825754078253353 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Cosh[ Tan[ x ]/Cos[ x ] ] (* Even Part *)`
	CROSSREFS	`Sequence in context: A100713 A056565 A187359 * A012479 A078791 A201069` `Adjacent sequences: A009164 A009165 A009166 * A009168 A009169 A009170`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended and signs tested Mar 15 1997 by Olivier Gerard.`

Content is available under The OEIS End-User License Agreement .

Last modified February 16 15:48 EST 2012. Contains 205931 sequences.