A012812 - OEIS

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A012812

sec(sec(x)*arctan(x))=1+1/2!*x^2+9/4!*x^4+345/6!*x^6+14833/8!*x^8...

1, 1, 9, 345, 14833, 1493265, 158895033, 30935964969, 6150088646497, 1967749424641953, 629235472952720105, 300014790466799113849, 140704010339485622390865, 93651237671421167849769905 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	CROSSREFS	`Sequence in context: A157589 A055601 A203745 * A119756 A063068 A130558` `Adjacent sequences: A012809 A012810 A012811 * A012813 A012814 A012815`
	KEYWORD	`nonn`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 14 15:19 EST 2012. Contains 205623 sequences.