A012507 - OEIS

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A012507

sec(cos(x)*arctan(x))=1+1/2!*x^2-15/4!*x^4+105/6!*x^6+8897/8!*x^8...

1, 1, -15, 105, 8897, -664815, -4523343, 8138992953, -972054629887, -115219461350367, 72803853486273265, -6666182957939643127, -7549270905441932464191, 4123382958180269131627825 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	CROSSREFS	`Sequence in context: A060218 A165892 A077261 * A143727 A041426 A074877` `Adjacent sequences: A012504 A012505 A012506 * A012508 A012509 A012510`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 15 16:56 EST 2012. Contains 205825 sequences.