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A020439 Numbers k such that the continued fraction for sqrt(k) has period 100. 4
2629, 3646, 4924, 5692, 5833, 5836, 6172, 6703, 6801, 7389, 7438, 8158, 8287, 8551, 8654, 9103, 10041, 10079, 10096, 10629, 10936, 11038, 11068, 11116, 11335, 11383, 11519, 11824, 11863, 11995, 12016, 12044, 12494, 12751, 12811, 12895, 13372, 13569 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

nn=15000; With[{nonsq=Complement[Range[nn], Range[ Floor[Sqrt[nn]]]^2]}, Select[ nonsq, Length[ ContinuedFraction[Sqrt[#]][[2]]]==100&]] (* Harvey P. Dale, May 22 2012 *)

CROSSREFS

Sequence in context: A221941 A234698 A190936 * A254776 A254769 A254722

Adjacent sequences:  A020436 A020437 A020438 * A020440 A020441 A020442

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified January 21 11:28 EST 2022. Contains 350477 sequences. (Running on oeis4.)