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A040389 Continued fraction for sqrt(410). 0
20, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40, 4, 40 (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)=22+18*(-1)^n-20*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava, Apr 30 2009]

MAPLE

with(numtheory): Digits := 300: convert(evalf(sqrt(410)), confrac);

MATHEMATICA

ContinuedFraction[Sqrt[410], 80] (* or *) PadRight[{20}, 80, {40, 4}] (* Harvey P. Dale, Dec 14 2012 *)

CROSSREFS

Sequence in context: A337157 A040388 A018816 * A040386 A309321 A104158

Adjacent sequences:  A040386 A040387 A040388 * A040390 A040391 A040392

KEYWORD

nonn,cofr,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified March 5 15:57 EST 2021. Contains 341825 sequences. (Running on oeis4.)