A013206 - OEIS

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A013206

log(sech(x)+sinh(x))=x-2/2!*x^2+6/3!*x^3-20/4!*x^4+120/5!*x^5...

1, -2, 6, -20, 120, -872, 7056, -68000, 758400, -9460352, 130918656, -1995073280, 33173038080, -597457144832, 11587651270656, -240799724687360, 5337660866396160, -125711013390221312 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	LINKS	`Table of n, a(n) for n=0..17.`
	CROSSREFS	`Sequence in context: A076323 A136795 A074115 * A073966 A013203 A007847` `Adjacent sequences: A013203 A013204 A013205 * A013207 A013208 A013209`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (patrick.demichel(AT)hp.com)`
	STATUS	`approved`

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Last modified May 19 21:56 EDT 2013. Contains 225436 sequences.