A012241 - OEIS

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A012241

log(cos(arcsinh(x)))=-1/2!*x^2+2/4!*x^4-40/6!*x^6+1360/8!*x^8...

-1, 2, -40, 1360, -87680, 8723200, -1254323200, 245463296000, -62768582656000, 20318491009024000, -8121379360440320000, 3928322245164728320000, -2261534088991670272000000 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A012637 A127429 A012834 * A099707 A198248 A163826` `Adjacent sequences: A012238 A012239 A012240 * A012242 A012243 A012244`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 15 05:12 EST 2012. Contains 205694 sequences.