A013080 - OEIS

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A013080

sech(arcsinh(x)+log(x+1))=1-4/2!*x^2+6/3!*x^3+69/4!*x^4-330/5!*x^5...

1, 0, -4, 6, 69, -330, -2700, 29925, 164745, -4116420, -9894150, 791943075, -1224167175, -199738989450, 1368120253500, 62416549069875, -901935831171375, -22756961540313000, 604804116364197750 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	CROSSREFS	`Sequence in context: A189790 A053489 A012898 * A013128 A012971 A197315` `Adjacent sequences: A013077 A013078 A013079 * A013081 A013082 A013083`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 14 23:04 EST 2012. Contains 205686 sequences.