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A040215 Continued fraction for sqrt(231). 0

%I

%S 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,

%T 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,

%U 30,5,30,5,30,5,30,5,30,5,30,5,30,5,30,5,30,5,30,5,30

%N Continued fraction for sqrt(231).

%H <a href="/index/Con#confC">Index entries for continued fractions for constants</a>

%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (0, 1).

%F 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]

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

%K nonn,cofr,easy

%O 0,1

%A _N. J. A. Sloane_.

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Last modified April 20 14:27 EDT 2019. Contains 322310 sequences. (Running on oeis4.)