A009557 - OEIS

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A009557

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

0, 1, 0, -4, 12, -19, -60, 818, -4872, 14401, 75240, -1619696, 14470500, -61780211, -451892532, 13265310134, -158017858320, 882221413217, 8296746885072, -308498052476476, 4593579141365820, -31680570948622259 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	MATHEMATICA	`Sin[ x ]/Cosh[ Log[ 1+x ] ]`
	CROSSREFS	`Sequence in context: A139388 A008177 A169583 * A050021 A133096 A104814` `Adjacent sequences: A009554 A009555 A009556 * A009558 A009559 A009560`
	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 19:13 EST 2012. Contains 206085 sequences.