A009398 - OEIS

This site is supported by donations to The OEIS Foundation.

A009398

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

0, 2, -12, 352, -16352, 1382912, -172372992, 30716649472, -7334631698432, 2270814362796032, -883463096359452672, 422158497266733678592, -243014206258719292915712, 165880670114405086398513152 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	MATHEMATICA	`Log[ 1+Tanh[ x ]Tan[ x ] ] ( Even Part *)`
	CROSSREFS	`Sequence in context: A074257 A192892 A105231 * A009698 A012724 A012624` `Adjacent sequences: A009395 A009396 A009397 * A009399 A009400 A009401`
	KEYWORD	`sign`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

Content is available under The OEIS End-User License Agreement .

Last modified February 16 01:29 EST 2012. Contains 205860 sequences.