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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
4538, 4673, 7477, 7825, 11785, 16553, 22129, 22426, 26533, 26858, 27514, 28513, 34217, 40441, 43705, 48053, 50258, 52058, 57269, 57746, 58706, 59674, 60161, 61141, 62129, 62626, 68329, 72553, 77017, 78125, 79241, 80365, 81497, 83785, 88577, 90362 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..36.

CROSSREFS

Subsequence of A003814.

Sequence in context: A234171 A262848 A307919 * A193311 A020432 A186471

Adjacent sequences:  A031604 A031605 A031606 * A031608 A031609 A031610

KEYWORD

nonn

AUTHOR

David W. Wilson

EXTENSIONS

First term 362 removed by Georg Fischer, Jun 16 2019

STATUS

approved

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Last modified January 27 21:37 EST 2022. Contains 350654 sequences. (Running on oeis4.)