id:A009107 - OEIS Search Results

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Expansion of cos(x)/cos(tanh(x)).

+0
2

1, 0, -8, 56, 512, -54912, 2590336, -69311488, -3936710656, 914002857984, -81770855727104, -2175764106870784, 2405710131432685568, -359158536158603378688, -106865524988327138951168 (list; graph; listen)

	OFFSET	`0,3`
	MATHEMATICA	`Cos[ x ]/Cos[ Tanh[ x ] ] (* Even Part *)`
	CROSSREFS	`Cf. A009297.` `Sequence in context: A087290 A086787 A098914 this_sequence A133671 A105850 A009089` `Adjacent sequences: A009104 A009105 A009106 this_sequence A009108 A009109 A009110`
	KEYWORD	`sign`
	AUTHOR	`R. H. Hardin (rhh(AT)cadence.com)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

AT&T Labs Research