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 A031717 Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 39. 1
 1523, 6088, 13695, 24344, 38035, 54768, 74543, 97360, 123219, 152120, 184063, 219048, 257075, 298144, 342255, 389408, 439603, 492840, 549119, 608440, 670803, 736208, 804655, 876144, 950675, 1028248, 1108863, 1192520, 1279219, 1368960 (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 ltcf39Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], 1, Min[ ContinuedFraction[s] [[2]]]] ==39]; Select[Range[1400000], ltcf39Q] (* Harvey P. Dale, Jun 20 2015 *) CROSSREFS Sequence in context: A073104 A031537 A217387 * A236880 A226700 A226701 Adjacent sequences:  A031714 A031715 A031716 * A031718 A031719 A031720 KEYWORD nonn AUTHOR STATUS approved

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Last modified September 20 09:30 EDT 2021. Contains 347579 sequences. (Running on oeis4.)