
13, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13, 26, 13
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OFFSET

0,1


LINKS

Table of n, a(n) for n=0..53.
Index entries for continued fractions for constants
Index entries for linear recurrences with constant coefficients, signature (0, 1).


FORMULA

a(n)=(1/2)[39+13*(1)^n]13*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava, Jun 10 2009]


MAPLE

Digits := 100: convert(evalf(sqrt(N)), confrac, 90, 'cvgts'):


MATHEMATICA

ContinuedFraction[Sqrt[171], 300] (* Vladimir Joseph Stephan Orlovsky, Mar 25 2011*)


CROSSREFS

Sequence in context: A060362 A003888 A303717 * A003889 A166545 A022347
Adjacent sequences: A040154 A040155 A040156 * A040158 A040159 A040160


KEYWORD

nonn,cofr,easy


AUTHOR

N. J. A. Sloane.


STATUS

approved

