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!)
A031607 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 19. 0

%I #14 Aug 18 2021 00:10:32

%S 4538,4673,7477,7825,11785,16553,22129,22426,26533,26858,27514,28513,

%T 34217,40441,43705,48053,50258,52058,57269,57746,58706,59674,60161,

%U 61141,62129,62626,68329,72553,77017,78125,79241,80365,81497,83785,88577,90362

%N 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 19.

%Y Subsequence of A003814.

%K nonn

%O 1,1

%A _David W. Wilson_

%E First term 362 removed by _Georg Fischer_, Jun 16 2019

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 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)