login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A040157 Continued fraction for sqrt(171). 1
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 (list; graph; refs; listen; history; text; internal format)
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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 20 16:33 EDT 2019. Contains 325185 sequences. (Running on oeis4.)