A012180 - OEIS

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A012180

tanh(tan(arctanh(x)))=x+2/3!*x^3+16/5!*x^5+48/7!*x^7-29696/9!*x^9...

1, 2, 16, 48, -29696, -6049792, -1262426112, -308569372672, -89297625350144, -30123113337716736, -11520007513318621184, -4775431672418431664128, -1952929261585732032528384, -545214673336986589066166272 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	LINKS	`Table of n, a(n) for n=0..13.`
	CROSSREFS	`Sequence in context: A223219 A063721 A232209 * A058376 A295906 A120948` `Adjacent sequences: A012177 A012178 A012179 * A012181 A012182 A012183`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (patrick.demichel(AT)hp.com)`
	STATUS	`approved`

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Last modified March 29 17:51 EDT 2023. Contains 361599 sequences. (Running on oeis4.)