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A031640 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 52. 0
17449, 55306, 55777, 83065, 84221, 115769, 117133, 153889, 155461, 157834, 196538, 198314, 200098, 250361, 252365, 302941, 309577, 360529, 368978, 370193, 424426, 425729, 427034, 428341, 430961, 433589, 434906, 438869, 504829, 507673 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..30.

CROSSREFS

Sequence in context: A322858 A251465 A278004 * A236006 A190758 A034624

Adjacent sequences:  A031637 A031638 A031639 * A031641 A031642 A031643

KEYWORD

nonn

AUTHOR

David W. Wilson

EXTENSIONS

First term 2705 removed by Georg Fischer, Jun 16 2019

STATUS

approved

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Last modified October 16 15:08 EDT 2021. Contains 348042 sequences. (Running on oeis4.)