id:A012800 - OEIS Search Results

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sech(sec(x)*tan(x))=1-1/2!*x^2-15/4!*x^4-177/6!*x^6+8225/8!*x^8...

+0
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1, -1, -15, -177, 8225, 1259231, 82092945, -6743602257, -3731314041535, -658546620230977, 68462273756819505, 102601344100683911439, 37004621343746850934625, -3605666448860960629195873 (list; graph; listen)

	OFFSET	`0,3`
	CROSSREFS	`Sequence in context: A071535 A081043 A009146 this_sequence A016216 A001717 A004992` `Adjacent sequences: A012797 A012798 A012799 this_sequence A012801 A012802 A012803`
	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