A012501 - OEIS

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A012501

cos(cos(x)*arctan(x))=1-1/2!*x^2+21/4!*x^4-645/6!*x^6+34153/8!*x^8...

1, -1, 21, -645, 34153, -2966505, 380114493, -67244074989, 15717842398417, -4694489063253585, 1744673430747688805, -789702534539438543573, 427739642844597474379833, -273184203052102765688128825 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	CROSSREFS	`Sequence in context: A141265 A025752 A163032 * A027408 A177840 A158216` `Adjacent sequences: A012498 A012499 A012500 * A012502 A012503 A012504`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.