id:A012256 - OEIS Search Results

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exp(tanh(arctan(x)))=1+x+1/2!*x^2-3/3!*x^3-15/4!*x^4+41/5!*x^5...

+0
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1, 1, 1, -3, -15, 41, 561, -1019, -38623, 12305, 4206881, 7478221, -661302639, -3005647943, 140958927825, 1143787246421, -38921417469119, -494108406644959, 13433349471318337, 250135591701350045 (list; graph; listen)

	OFFSET	`0,4`
	CROSSREFS	`Sequence in context: A065765 A014309 A096742 this_sequence A012222 A069267 A059270` `Adjacent sequences: A012253 A012254 A012255 this_sequence A012257 A012258 A012259`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research