id:A003721 - OEIS Search Results

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Expansion of tan(tanh(x)).
(Formerly M4571)

+0
1

1, 0, -8, 112, -128, -109824, 8141824, -353878016, -9666461696, 5151942574080, -825073851170816, 76429076694827008, 2051308253366714368, -2361338488910424047616, 171581865952588387581952 (list; graph; listen)

	OFFSET	`0,3`
	MATHEMATICA	`Tan[ Tanh[ x ] ] (* Odd Part *)`
	CROSSREFS	`Adjacent sequences: A003718 A003719 A003720 this_sequence A003722 A003723 A003724` `Sequence in context: A020560 A079660 A131621 this_sequence A075851 A053536 A139741`
	KEYWORD	`sign`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net), Simon Plouffe (simon.plouffe(AT)gmail.com)`

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Last modified January 7 17:35 EST 2009. Contains 152824 sequences.

AT&T Labs Research