id:A009769 - OEIS Search Results

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Expansion of tanh(ln(1+1/x)).

+0
1

1, 0, -4, 24, -96, 0, 5760, -80640, 645120, 0, -116121600, 2554675200, -30656102400, 0, 11158821273600, -334764638208000, 5356234211328000, 0, -3278015337332736000, 124564582818643968000, -2491291656372879360000, 0 (list; graph; listen)

	OFFSET	`0,3`
	MATHEMATICA	`Tanh[ Log[ 1+1/x ] ]`
	CROSSREFS	`Sequence in context: A026967 A026977 A026952 this_sequence A119878 A054603 A100381` `Adjacent sequences: A009766 A009767 A009768 this_sequence A009770 A009771 A009772`
	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 November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research