A009434 - OEIS

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A009434

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

0, 1, -1, -1, 0, 69, -225, -1653, 3976, 187401, -965385, -14516745, 61266744, 3032650893, -21187300953, -491788726653, 2947006495920, 166337505847057, -1463633608132017, -46261934493321105, 358635306874354320 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,6`
	MATHEMATICA	`Log[ 1+x ]/Cosh[ Tanh[ x ] ]`
	CROSSREFS	`Sequence in context: A044782 A020296 A153672 * A115920 A183447 A188546` `Adjacent sequences: A009431 A009432 A009433 * A009435 A009436 A009437`
	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 17 18:20 EST 2012. Contains 206061 sequences.