A009156 - OEIS

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A009156

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

1, 0, 1, -3, 20, -140, 1216, -12096, 137080, -1737504, 24368656, -374527120, 6259083896, -112992788688, 2191121957480, -45420491782680, 1002232901602496, -23453004823018496, 580102806342112960 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	MATHEMATICA	`Cosh[ Tan[ Log[ 1+x ] ] ]`
	CROSSREFS	`Sequence in context: A073514 A163065 A082143 * A074573 A068571 A074569` `Adjacent sequences: A009153 A009154 A009155 * A009157 A009158 A009159`
	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 23:53 EST 2012. Contains 205689 sequences.