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A040215 Continued fraction for sqrt(231). 0
15, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30, 5, 30 (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)=(1/2)*[35+25*(-1)^n]-15*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava, Apr 23 2009]

MAPLE

with(numtheory): Digits := 300: convert(evalf(sqrt(231)), confrac);

CROSSREFS

Sequence in context: A051998 A131611 A166209 * A147422 A147084 A147361

Adjacent sequences:  A040212 A040213 A040214 * A040216 A040217 A040218

KEYWORD

nonn,cofr,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified March 25 03:50 EDT 2019. Contains 321450 sequences. (Running on oeis4.)