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A040380 Continued fraction for sqrt(401). 5
20, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40 (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)=40-20*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava, Apr 29 2009]

MAPLE

with(numtheory): Digits := 300: convert(evalf(sqrt(401)), confrac);

CROSSREFS

Sequence in context: A238245 A215144 A333234 * A154044 A235289 A296764

Adjacent sequences:  A040377 A040378 A040379 * A040381 A040382 A040383

KEYWORD

nonn,cofr,easy,less

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified April 22 22:19 EDT 2021. Contains 343197 sequences. (Running on oeis4.)