id:A009160 - OEIS Search Results

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

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1, 2, 20, 448, 17296, 1013600, 83547584, 9196867072, 1301697829120, 230093807905280, 49636887216382976, 12825384465418534912, 3908078275606800338944, 1386160615200497825275904 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`Cosh[ Tan[ x ] ]/Cos[ x ] (* Even Part *)`
	CROSSREFS	`Sequence in context: A009746 A009749 A012533 this_sequence A009252 A012816 A012340` `Adjacent sequences: A009157 A009158 A009159 this_sequence A009161 A009162 A009163`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended and signs tested Mar 15 1997 by Olivier Gerard.`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research