id:A009119 - OEIS Search Results

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

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1, -1, 13, -301, 11705, -698521, 59340997, -6782462597, 1000434618609, -184576848771889, 41577074746699261, -11216502744649033437, 3567416307426404300713, -1320192785381894987925961 (list; graph; listen)

	OFFSET	`0,3`
	MATHEMATICA	`Cos[ x/Cosh[ x ] ] (* Even Part *)`
	CROSSREFS	`Sequence in context: A023357 A076130 A035272 this_sequence A142425 A119131 A081458` `Adjacent sequences: A009116 A009117 A009118 this_sequence A009120 A009121 A009122`
	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 July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research