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A040662 Continued fraction for sqrt(689). 1
26, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52, 4, 52 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..74.

Index entries for continued fractions for constants

Index entries for linear recurrences with constant coefficients, signature (0, 1).

FORMULA

a(n)=28+24*(-1)^n-26*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava, May 18 2009]

MAPLE

with(numtheory): Digits := 300: convert(evalf(sqrt(689)), confrac);

MATHEMATICA

ContinuedFraction[Sqrt[689], 60] (* or *) PadRight[{26, 4}, 80, {52, 4}] (* Harvey P. Dale, Dec 03 2011 *)

CROSSREFS

Sequence in context: A040660 A040661 A140871 * A082058 A040658 A217974

Adjacent sequences:  A040659 A040660 A040661 * A040663 A040664 A040665

KEYWORD

nonn,cofr,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified July 22 07:23 EDT 2019. Contains 325216 sequences. (Running on oeis4.)