A009187 - OEIS

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A009187

Expansion of cosh(x)/exp(tanh(x)).

1, -1, 2, -2, 0, 8, 8, -184, 192, 5568, -20480, -231552, 1837696, 11751296, -187743488, -596164352, 22698672128, 4342886400, -3236847570944, 10035384119296, 536307107184640, -3825733461393408, -101121059849109504 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Cosh[ x ]/Exp[ Tanh[ x ] ]`
	CROSSREFS	`Sequence in context: A060007 A021457 A137456 * A009803 A009615 A184011` `Adjacent sequences: A009184 A009185 A009186 * A009188 A009189 A009190`
	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 16 17:48 EST 2012. Contains 205939 sequences.