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!)
A031600 Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 12. 0
1049, 3217, 3445, 5021, 6569, 8506, 8689, 11314, 11738, 11953, 14285, 16825, 17341, 18397, 20129, 20693, 21554, 22138, 22433, 22826, 23729, 24034, 24341, 24961, 25274, 25589, 26546, 29629, 30313, 31817, 33965, 35437, 35930, 36682, 37061, 38210 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
CF(sqrt(145)) = (12, (24)), therefore 145 is not in the sequence.
CF(sqrt(1049)) = (32, (2,1,1,2,1,4,3,1,5,7,1,12, 12,1,7,5,1,3,4,1,2,1,1,2, 64)), therefore 1049 is in the sequence.
CROSSREFS
Sequence in context: A337960 A331346 A164771 * A251272 A030083 A184203
KEYWORD
nonn
AUTHOR
EXTENSIONS
First term 145 removed by Georg Fischer, Jun 15 2019
Definition clarified by N. J. A. Sloane, Aug 18 2021
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 July 13 11:56 EDT 2024. Contains 374282 sequences. (Running on oeis4.)