A009160 - OEIS

This site is supported by donations to The OEIS Foundation.

A009160

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

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

	OFFSET	`0,2`
	MATHEMATICA	`Cosh[ Tan[ x ] ]/Cos[ x ] (* Even Part *)`
	CROSSREFS	`Sequence in context: A009746 A009749 A012533 * A188811 A009252 A012816` `Adjacent sequences: A009157 A009158 A009159 * A009161 A009162 A009163`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended and signs tested Mar 15 1997 by Olivier Gerard.`

Content is available under The OEIS End-User License Agreement .

Last modified February 17 00:09 EST 2012. Contains 205978 sequences.