A009642 - OEIS

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A009642

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

0, 1, -1, 1, -12, 75, -555, 4863, -48832, 552293, -6948765, 96252429, -1455398604, 23851683999, -421107222263, 7967875766875, -160844272481760, 3450332758515657, -78376836240861273, 1879454111175884697 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	MATHEMATICA	`Tan[ Log[ 1+x ] ]*Cos[ x ]`
	CROSSREFS	`Sequence in context: A092867 A053310 A006235 * A051104 A044199 A044580` `Adjacent sequences: A009639 A009640 A009641 * A009643 A009644 A009645`
	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 15 07:06 EST 2012. Contains 205694 sequences.