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A031609 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 21. 0
1033, 5674, 9106, 9685, 13577, 14045, 19213, 19769, 20333, 25189, 26794, 33413, 33778, 40361, 41165, 42797, 43625, 51517, 53341, 59093, 59578, 61538, 63029, 64033, 69269, 70321, 71381, 71914, 72986, 74066, 74609, 75154, 75701, 93257, 94477, 96941 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
CROSSREFS
Subsequence of A003814.
Sequence in context: A168225 A282576 A122716 * A236804 A023063 A245680
KEYWORD
nonn
AUTHOR
EXTENSIONS
First term 442 removed by Georg Fischer, Jun 16 2019
STATUS
approved

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Last modified April 18 06:12 EDT 2024. Contains 371769 sequences. (Running on oeis4.)