id:A012852 - OEIS Search Results

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sech(sec(x)*arctanh(x))=1-1/2!*x^2-15/4!*x^4-225/6!*x^6+3297/8!*x^8...

+0
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1, -1, -15, -225, 3297, 973695, 99434577, 3364479391, -1767300967487, -640573924497921, -102867079807004495, 22939113754550703391, 27513402069157221548193, 11830594343212717024871295 (list; graph; listen)

	OFFSET	`0,3`
	CROSSREFS	`Sequence in context: A057500 A137916 A078364 this_sequence A001024 A012643 A067222` `Adjacent sequences: A012849 A012850 A012851 this_sequence A012853 A012854 A012855`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

AT&T Labs Research