A009139 - OEIS

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A009139

Expansion of cosh(ln(1+x)/exp(x)).

1, 0, 1, -9, 60, -390, 2820, -24010, 238336, -2659104, 32417160, -426027008, 6004088112, -90491148176, 1454386367616, -24843370627920, 449435283828992, -8582294948325760, 172476215457600000, -3638420414864043264 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	MATHEMATICA	`Cosh[ Log[ 1+x ]/Exp[ x ] ]`
	CROSSREFS	`Sequence in context: A082150 A026785 A153820 * A086018 A197402 A159037` `Adjacent sequences: A009136 A009137 A009138 * A009140 A009141 A009142`
	KEYWORD	`sign,easy`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

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Last modified February 15 08:49 EST 2012. Contains 205740 sequences.