A009369 - OEIS

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A009369

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

0, 1, -1, 1, -8, 45, -301, 2357, -21608, 223769, -2602081, 33484713, -473210528, 7282225093, -121272163741, 2172791685469, -41680241726768, 852337358029617, -18510436676621281, 425474580069715025, -10319766893265298328 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	MATHEMATICA	`Log[ 1+Tan[ x ] ]*Cos[ x ]`
	CROSSREFS	`Sequence in context: A055422 A204618 A006887 * A120044 A002686 A110348` `Adjacent sequences: A009366 A009367 A009368 * A009370 A009371 A009372`
	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 16 13:48 EST 2012. Contains 205921 sequences.