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A040418 Continued fraction for sqrt(439). 1
20, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19, 1, 40, 1, 19 (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, 0, 0, 1).

FORMULA

a(n)=(1/24)*{-173*(n mod 4)+169*[(n+1) mod 4]-47*[(n+2) mod 4]+295*[(n+3) mod 4]}-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(439)), confrac);

MATHEMATICA

ContinuedFraction[Sqrt[439], 120] (* or *) PadRight[{20}, 120, {40, 1, 19, 1}] (* Harvey P. Dale, Jun 24 2018 *)

CROSSREFS

Sequence in context: A040417 A278414 A003833 * A140116 A084923 A141589

Adjacent sequences:  A040415 A040416 A040417 * A040419 A040420 A040421

KEYWORD

nonn,cofr,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified November 20 12:37 EST 2018. Contains 317402 sequences. (Running on oeis4.)