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A040662
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Continued fraction for sqrt(689).
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0
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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; internal format)
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OFFSET
| 0,1
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LINKS
| Index entries for continued fractions for constants
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FORMULA
| a(n)=28+24*(-1)^n-26*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), May 18 2009]
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MAPLE
| with(numtheory): Digits := 300: convert(evalf(sqrt(689)), confrac);
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MATHEMATICA
| ContinuedFraction[Sqrt[689], 60] (* or *) PadRight[{26, 4}, 80, {52, 4}] (* From Harvey P. Dale, Dec 03 2011 *)
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CROSSREFS
| Sequence in context: A040660 A040661 A140871 * A082058 A040658 A040659
Adjacent sequences: A040659 A040660 A040661 * A040663 A040664 A040665
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KEYWORD
| nonn,cofr,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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