A013567 - OEIS

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A013567

E.g.f. sech(log(x+1)/exp(x))=1-1/2!*x^2+9/3!*x^3-54/4!*x^4+210/5!*x^5...

1, 0, -1, 9, -54, 210, 510, -24500, 355544, -3310776, 7970880, 511460048, -14772993312, 247420878848, -2080751146656, -34093875419760, 2085552636479488, -56037789835944320, 880848150693672192 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	CROSSREFS	`Sequence in context: A093846 A152994 A034719 * A073974 A035927 A059597` `Adjacent sequences: A013564 A013565 A013566 * A013568 A013569 A013570`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (patrick.demichel(AT)hp.com)`

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Last modified February 13 16:05 EST 2012. Contains 205522 sequences.