A009130 - OEIS

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A009130

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

1, 0, 2, -3, 23, -90, 676, -4305, 37533, -325332, 3366166, -36472095, 443702291, -5732993838, 80707226328, -1207617980205, 19365202513145, -328878787017000, 5925189947339626, -112532916285619515, 2251485624038961615 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Cosh[ Log[ 1+x ] ]/Cos[ x ]`
	CROSSREFS	`Sequence in context: A041787 A195241 A090180 * A093504 A009180 A041459` `Adjacent sequences: A009127 A009128 A009129 * A009131 A009132 A009133`
	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 13 18:46 EST 2012. Contains 205535 sequences.