A009379 - OEIS

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A009379

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

0, 2, -4, 96, -2080, 125440, -8629248, 996007936, -140162633728, 27058965184512, -6350990843576320, 1866805063173799936, -653569786506324738048, 273136898848234632380416, -133034893921204302732328960 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	MATHEMATICA	`Log[ 1+Tan[ x ]x ] ( Even Part *)`
	CROSSREFS	`Sequence in context: A018410 A156496 A007534 * A092918 A018428 A128773` `Adjacent sequences: A009376 A009377 A009378 * A009380 A009381 A009382`
	KEYWORD	`sign`
	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 14 23:04 EST 2012. Contains 205686 sequences.