login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A020421 Numbers k such that the continued fraction for sqrt(k) has period 82. 0
2164, 2614, 2641, 2644, 3067, 3397, 4468, 4723, 5059, 5062, 6106, 6249, 6937, 7021, 7291, 7499, 7654, 8243, 8434, 8516, 9206, 9307, 9361, 9561, 9569, 9694, 9777, 10053, 10173, 10349, 10469, 10677, 11133, 11171, 11241, 11416, 11845, 11860, 11899, 12219 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
cf82Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], False, Length[ ContinuedFraction[ s][[2]]]==82]]; Select[Range[13000], cf82Q] (* Harvey P. Dale, Dec 17 2013 *)
CROSSREFS
Sequence in context: A035872 A126831 A161998 * A203736 A251067 A184558
KEYWORD
nonn
AUTHOR
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 15:34 EDT 2024. Contains 371794 sequences. (Running on oeis4.)