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A031727 Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 49. 1

%I

%S 2403,9608,21615,38424,60035,86448,117663,153680,194499,240120,290543,

%T 345768,405795,470624,540255,614688,693923,777960,866799,960440,

%U 1058883,1162128,1270175,1383024,1500675,1623128,1750383,1882440,2019299,2160960

%N Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 49.

%H Charles R Greathouse IV, <a href="/A031727/b031727.txt">Table of n, a(n) for n = 1..10000</a>

%t cf49Q[n_]:=Module[{s=Sqrt[n]},If[IntegerQ[s],1,Min[ContinuedFraction[s][[2]]]==49]]; Select[Range[217*10^4],cf49Q] (* _Harvey P. Dale_, Jul 17 2019 *)

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified May 21 21:43 EDT 2022. Contains 353929 sequences. (Running on oeis4.)