A009787 - OEIS

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A009787

Expansion of tanh(log(1+x)/cosh(x)).

0, 1, -1, -3, 12, 35, -435, -161, 23968, -68811, -1874205, 15189361, 177102156, -3209424153, -15134777567, 750725838563, -828777844320, -197682938738071, 1577204564247783, 55820827940141285, -1005440186803008980 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,4`
	LINKS	`Table of n, a(n) for n=0..20.`
	MATHEMATICA	`Tanh[ Log[ 1+x ]/Cosh[ x ] ]`
	CROSSREFS	`Sequence in context: A320346 A305542 A232899 * A135190 A101069 A225259` `Adjacent sequences: A009784 A009785 A009786 * A009788 A009789 A009790`
	KEYWORD	`sign,easy`
	AUTHOR	`R. H. Hardin`
	EXTENSIONS	`Extended with signs by Olivier Gérard, Mar 15 1997`
	STATUS	`approved`

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Last modified January 19 00:03 EST 2021. Contains 340262 sequences. (Running on oeis4.)