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 A040653 Continued fraction for sqrt(680). 1

%I

%S 26,13,52,13,52,13,52,13,52,13,52,13,52,13,52,13,52,13,52,13,52,13,52,

%T 13,52,13,52,13,52,13,52,13,52,13,52,13,52,13,52,13,52,13,52,13,52,13,

%U 52,13,52,13,52,13,52,13,52,13,52,13,52,13,52,13,52

%N Continued fraction for sqrt(680).

%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)*[65+39*(-1)^n]-26*[C(2*n,n) mod 2], with n>=0 [From _Paolo P. Lava_, May 18 2009]

%p with(numtheory): Digits := 300: convert(evalf(sqrt(680)),confrac);

%K nonn,cofr,easy

%O 0,1

%A _N. J. A. Sloane_.

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Last modified August 24 03:51 EDT 2019. Contains 326260 sequences. (Running on oeis4.)