A009372 - OEIS

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A009372

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

0, 1, -1, 7, -20, 145, -781, 6711, -55040, 578465, -6372241, 81400295, -1118247140, 17017477425, -278763221101, 4944906503959, -93847119338720, 1903841305391425, -41033336868850561, 937270802152757703 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	MATHEMATICA	`Log[ 1+Tan[ x ]]/Cos[ x ]`
	CROSSREFS	`Sequence in context: A055267 A196584 A009370 * A051102 A158280 A201072` `Adjacent sequences: A009369 A009370 A009371 * A009373 A009374 A009375`
	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 17 21:13 EST 2012. Contains 206085 sequences.