A012110 - OEIS

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A012110

sech(arcsin(sinh(x)))=1-1/2!*x^2-3/4!*x^4-21/6!*x^6-1543/8!*x^8...

1, -1, -3, -21, -1543, -139241, -17567883, -3247844861, -820544875023, -270409929116881, -112752402237298963, -58042577464009155301, -36153625550535244615703, -26800108152000698851560121 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,3`
	LINKS	`Table of n, a(n) for n=0..13.`
	CROSSREFS	`Sequence in context: A111438 A058635 A077260 * A054739 A117508 A001139` `Adjacent sequences: A012107 A012108 A012109 * A012111 A012112 A012113`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (patrick.demichel(AT)hp.com)`
	STATUS	`approved`

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Last modified May 24 11:13 EDT 2013. Contains 225619 sequences.