A009430 - OEIS

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A009430

Expansion of ln(1+x)/cosh(ln(1+x)).

0, 1, -1, -1, 12, -56, 180, -204, -2688, 26496, -103680, -679680, 18627840, -229063680, 1990759680, -12036729600, 40874803200, -365550796800, 21248859340800, -696906569318400, 16303221817344000, -317662379016192000 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	MATHEMATICA	`Log[ 1+x ]/Cosh[ Log[ 1+x ] ]`
	CROSSREFS	`Sequence in context: A035005 A001386 A046998 * A035289 A009827 A068418` `Adjacent sequences: A009427 A009428 A009429 * A009431 A009432 A009433`
	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 14 13:08 EST 2012. Contains 205623 sequences.