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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A031841 Period of continued fraction for sqrt(n) contains exactly 73 ones. 0
45799, 56323, 61831, 78247, 99811, 106387, 133003, 136315, 139807, 147715, 150331, 151139, 162559, 162835, 174399, 178363, 188031, 188871, 192376, 198535, 206259, 215431, 216863, 219007, 221779, 225496, 225592, 227859, 230039, 233815, 239896 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..31.

MATHEMATICA

cf73Q[n_]:=Module[{sqr=Sqrt[n]}, !IntegerQ[sqr] && Count[ ContinuedFraction[ sqr] [[2]], 1]==73]; Select[Range[250000], cf73Q] (* Harvey P. Dale, Nov 23 2012 *)

CROSSREFS

Sequence in context: A202915 A257358 A232255 * A031635 A159725 A210306

Adjacent sequences: A031838 A031839 A031840 * A031842 A031843 A031844

KEYWORD

nonn

AUTHOR

David W. Wilson

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 November 26 17:30 EST 2022. Contains 358362 sequences. (Running on oeis4.)