A009810 - OEIS

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A009810

Expansion of tanh(tan(x)).exp(x).

0, 1, 2, 3, 4, -3, -42, -273, -1336, -5159, -16726, 62139, 1194700, 16414101, 153304830, 1357293927, 10698400400, 59192332081, 188012481362, -5204089208589, -107922523124588, -1943937262679379, -26275693823306202 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Tanh[ Tan[ x ] ]*Exp[ x ]`
	CROSSREFS	`Sequence in context: A009716 A009590 A009492 * A111362 A134581 A099587` `Adjacent sequences: A009807 A009808 A009809 * A009811 A009812 A009813`
	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 16 10:53 EST 2012. Contains 205904 sequences.