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A040870 Continued fraction for sqrt(901). 4
30, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..62.

Index entries for continued fractions for constants

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

FORMULA

a(n)=60-30*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava, May 29 2009]

MAPLE

with(numtheory): Digits := 300: convert(evalf(sqrt(901)), confrac);

MATHEMATICA

Block[{$MaxExtraPrecision=1000}, ContinuedFraction[Sqrt[901], 100]] (* or *) PadRight[{30}, 100, 60] (* Harvey P. Dale, Sep 01 2014 *)

CROSSREFS

Sequence in context: A004962 A271744 A121960 * A280011 A175785 A051488

Adjacent sequences:  A040867 A040868 A040869 * A040871 A040872 A040873

KEYWORD

nonn,cofr,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified December 15 20:10 EST 2018. Contains 318154 sequences. (Running on oeis4.)