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!)
A031837 Period of continued fraction for sqrt(n) contains exactly 69 ones. 0
25519, 47167, 51067, 75839, 103027, 123463, 123971, 126655, 128083, 132823, 145847, 151411, 154507, 159895, 160043, 187384, 198067, 202211, 216875, 217807, 218951, 219055, 219271, 223687, 234779, 234955, 236099, 242215, 246999, 247487 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
cf69Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], 1, Count[ContinuedFraction[s][[2]], 1]]==69]; Select[ Range[250000], cf69Q] (* Harvey P. Dale, Apr 01 2023 *)
CROSSREFS
Sequence in context: A324635 A242141 A124997 * A237865 A202646 A210093
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 March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)