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A031735 Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 57. 1
3251, 13000, 29247, 51992, 81235, 116976, 159215, 207952, 263187, 324920, 393151, 467880, 549107, 636832, 731055, 831776, 938995, 1052712, 1172927, 1299640, 1432851, 1572560, 1718767, 1871472, 2030675, 2196376, 2368575, 2547272, 2732467 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

MATHEMATICA

cf57Q[n_]:=Module[{s=Sqrt[n], cf}, cf=If[IntegerQ[s], {1}, Min[ ContinuedFraction[ s][[2]]]]==57]; Select[Range[274*10^4], cf57Q] (* Harvey P. Dale, Jul 21 2020 *)

CROSSREFS

Sequence in context: A031555 A106723 A270799 * A144936 A164077 A183656

Adjacent sequences: A031732 A031733 A031734 * A031736 A031737 A031738

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified December 9 04:13 EST 2022. Contains 358698 sequences. (Running on oeis4.)