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A031600 Numbers k such that the continued fraction for sqrt(k) has odd period and central terms 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

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

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: A251375 A281033 A164771 * A251272 A030083 A184203

Adjacent sequences:  A031597 A031598 A031599 * A031601 A031602 A031603

KEYWORD

nonn

AUTHOR

David W. Wilson

EXTENSIONS

First term 145 removed by Georg Fischer, Jun 15 2019

STATUS

approved

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Last modified September 21 04:10 EDT 2019. Contains 327253 sequences. (Running on oeis4.)