A009375 - OEIS

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A009375

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

0, 1, -1, 7, -26, 165, -1216, 10827, -111376, 1316585, -17441536, 257028847, -4164440576, 73616009805, -1409649350656, 29070305745267, -642306123237376, 15137914082015825, -379068323095576576, 10050622525103392087 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,4`
	LINKS	`Table of n, a(n) for n=0..19.`
	MATHEMATICA	`Log[ 1+Tan[ x ]*Cosh[ x ]]`
	CROSSREFS	`Sequence in context: A026617 A026683 A197053 * A009380 A183329 A166406` `Adjacent sequences: A009372 A009373 A009374 * A009376 A009377 A009378`
	KEYWORD	`sign,easy`
	AUTHOR	`R. H. Hardin`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`
	STATUS	`approved`

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Last modified May 22 20:46 EDT 2013. Contains 225583 sequences.