A078690 - OEIS

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A078690

Continued fraction expansion of e^(2/5).

1, 2, 30, 12, 1, 1, 17, 90, 27, 1, 1, 32, 150, 42, 1, 1, 47, 210, 57, 1, 1, 62, 270, 72, 1, 1, 77, 330, 87, 1, 1, 92, 390, 102, 1, 1, 107, 450, 117, 1, 1, 122, 510, 132, 1, 1, 137, 570, 147, 1, 1, 152, 630, 162, 1, 1, 167, 690, 177, 1, 1, 182, 750, 192, 1, 1, 197, 810, 207 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	LINKS	`G. Xiao, Contfrac` `K. Matthews, Finding the continued fraction of e^(l/m)`
	FORMULA	`for k>=0, a(5k+1)=15k+2 a(5k+2)=60k+30 a(5k+3)=15k+12 a(5k)=a(5k+4)=1`
	MATHEMATICA	`Block[{$MaxExtraPrecision=1000}, ContinuedFraction[E^(2/5), 70]] (* From Harvey P. Dale, Sep 04 2011 *)`
	PROG	`(PARI) contfrac(exp(2/5))`
	CROSSREFS	`Cf. A069951.` `Sequence in context: A180128 A087194 A058988 * A071056 A075716 A022377` `Adjacent sequences: A078687 A078688 A078689 * A078691 A078692 A078693`
	KEYWORD	`cofr,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 17 2002`

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Last modified February 16 13:56 EST 2012. Contains 205921 sequences.