A009140 - OEIS

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A009140

Expansion of cosh(ln(1+x)^2).

1, 0, 0, 0, 12, -120, 1020, -8820, 82908, -867888, 10145760, -131406000, 1864232832, -28656815616, 473108471472, -8332064722800, 155724385537488, -3076215029701248, 64018830395437056, -1399676595110345088 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	MATHEMATICA	`Cosh[ Log[ 1+x ]^2 ]`
	CROSSREFS	`Sequence in context: A012443 A012274 A009035 * A012273 A008465 A115902` `Adjacent sequences: A009137 A009138 A009139 * A009141 A009142 A009143`
	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 21:09 EST 2012. Contains 205561 sequences.