A009731 - OEIS

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A009731

Expansion of tan(x)*cosh(ln(1+x)).

0, 1, 0, 5, -12, 96, -480, 3968, -29568, 283840, -2759040, 31139712, -369431040, 4852567552, -67622790144, 1018594276352, -16267048304640, 277008597516288, -4982377179119616, 94730142262034432, -1894021067538432000 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,4`
	LINKS	`Table of n, a(n) for n=0..20.`
	MATHEMATICA	`Tan[ x ]*Cosh[ Log[ 1+x ] ]`
	CROSSREFS	`Sequence in context: A064371 A009414 A009426 * A009427 A009754 A096314` `Adjacent sequences: A009728 A009729 A009730 * A009732 A009733 A009734`
	KEYWORD	`sign,easy`
	AUTHOR	`R. H. Hardin`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`
	STATUS	`approved`

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Last modified May 24 04:53 EDT 2013. Contains 225615 sequences.