A012495 - OEIS

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A012495

Expansion of arcsinh(sin(x)).

1, -2, 20, -632, 39440, -4087712, 634237760, -137605112192, 39776178356480, -14775064298435072, 6857795892626969600, -3889298341511511652352, 2646362625886738240901120, -2127690488032789501903020032 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`arcsinh(cos(x)tan(x))=x-2/3!x^3+20/5!x^5-632/7!x^7+39440/9!x^9...` `arcsin(sinh(x)) = x + 2x^3/3! + 20x^5/5! + 620x^7/7! +...` `arccosh(sin(x)) = Pi/2 - x + 2x^3/3! - 20x^5/5! + 620*x^7/7! -...`
	CROSSREFS	`Cf. A101922.` `Sequence in context: A009182 A015207 A054941 * A168480 A198761 A171799` `Adjacent sequences: A012492 A012493 A012494 * A012496 A012497 A012498`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 16 11:30 EST 2012. Contains 205907 sequences.