id:A009711 - OEIS Search Results

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

+0
1

0, 1, -1, 2, -6, 16, 0, -568, 7504, -78248, 739080, -6314848, 44072688, -125928464, -3754236304, 114500663552, -2264653307520, 37495468333696, -536284797406848, 6159440282136320, -34551694794080000, -931439976890484224 (list; graph; listen)

	OFFSET	`0,4`
	MATHEMATICA	`Tan[ Tanh[ Log[ 1+x ] ] ]`
	CROSSREFS	`Sequence in context: A078328 A038111 A123475 this_sequence A009586 A009487 A009806` `Adjacent sequences: A009708 A009709 A009710 this_sequence A009712 A009713 A009714`
	KEYWORD	`sign,easy`
	AUTHOR	`R. H. Hardin (rhh(AT)cadence.com)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

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Last modified September 5 01:44 EDT 2008. Contains 143476 sequences.

AT&T Labs Research