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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A020420 Numbers n such that continued fraction for sqrt(n) has period 81. 0
3169, 3697, 5233, 6269, 6521, 9521, 9754, 9946, 10169, 12149, 12202, 12385, 13738, 15461, 15706, 15898, 17321, 18922, 19853, 20065, 20341, 21977, 21985, 23333, 24154, 24457, 24953, 25013, 25034, 25181, 27109, 27781, 27802, 28114, 28249, 28786, 28873 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..37.

CROSSREFS

Sequence in context: A068266 A140350 A217247 * A155484 A129472 A023309

Adjacent sequences:  A020417 A020418 A020419 * A020421 A020422 A020423

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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 18 07:44 EDT 2019. Contains 324203 sequences. (Running on oeis4.)