A009020 - OEIS

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A009020

Expansion of cos(ln(1+sinh(x))).

1, 0, -1, 3, -14, 70, -406, 2723, -20684, 176100, -1661236, 17182143, -193042904, 2335585330, -30176889016, 412862112263, -5925850093424, 88231921922760, -1341868300356496, 20329433614333083, -291715707804107744 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	MATHEMATICA	`Cos[ Log[ 1+Sinh[ x ] ] ]`
	CROSSREFS	`Sequence in context: A161939 A001579 A006772 * A186765 A109792 A137177` `Adjacent sequences: A009017 A009018 A009019 * A009021 A009022 A009023`
	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 17 15:44 EST 2012. Contains 206050 sequences.