A012265 - OEIS

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A012265

x - x^3/3! + x^5/5! - ... + (-1)^n*x^(2n+1)/(2n+1)! has 2a(n)+1 real roots.

0, 1, 0, 1, 2, 1, 2, 3, 2, 3, 2, 3, 4, 3, 4, 3, 4, 5, 4, 5, 6, 5, 6, 5, 6, 7, 6, 7, 8, 7, 8, 7, 8, 9, 8, 9, 8, 9, 10, 9, 10, 11, 10, 11, 10, 11, 12, 11, 12, 11, 12, 13, 12, 13, 14, 13, 14, 13, 14, 15, 14, 15, 16 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	REFERENCES	`Jim Propp (propp(AT)math.wisc.edu), posting to math-fun mailing list May 30 1997.`
	CROSSREFS	`Cf. A012264.` `Sequence in context: A005812 A136625 A086520 * A006641 A115756 A067731` `Adjacent sequences: A012262 A012263 A012264 * A012266 A012267 A012268`
	KEYWORD	`nonn,easy,nice`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from James A. Sellers (sellersj(AT)math.psu.edu)`

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Last modified February 15 03:22 EST 2012. Contains 205694 sequences.