id:A009842 - OEIS Search Results

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

+0
1

0, 1, 0, -5, 12, 6, -120, 442, -2352, 13192, 53280, -1665432, 12223200, -6629648, -706340544, 9387463888, -95898673920, 563447710848, 8308014488064, -283290718941056, 3505513923832320, -9173243369732864, -499029405102412800 (list; graph; listen)

	OFFSET	`0,4`
	MATHEMATICA	`Tanh[ x ]/Cosh[ Log[ 1+x ] ]`
	CROSSREFS	`Sequence in context: A022835 A022834 A046610 this_sequence A070368 A066326 A015242` `Adjacent sequences: A009839 A009840 A009841 this_sequence A009843 A009844 A009845`
	KEYWORD	`sign,easy`
	AUTHOR	`R. H. Hardin (rhh(AT)cadence.com)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

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Last modified September 7 15:23 EDT 2008. Contains 143483 sequences.

AT&T Labs Research