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 A031746 Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 68. 1
 1157, 4626, 10407, 18500, 28905, 41622, 56651, 73992, 93645, 115610, 139887, 166476, 195377, 226590, 260115, 295952, 334101, 374562, 417335, 462420, 509817, 559526, 611547, 665880, 722525, 781482, 842751, 906332, 972225, 1040430, 1110947 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) = 1156n^2 + n for n < 71, but a(71) = 5669230. - Charles R Greathouse IV, Aug 04 2017 LINKS Charles R Greathouse IV, Table of n, a(n) for n = 1..10000 MATHEMATICA lt68Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], 1, Min[ContinuedFraction[s][[2]]]==68]]; Select[Range[12*10^5], lt68Q] (* Harvey P. Dale, Jun 07 2018 *) CROSSREFS Sequence in context: A264278 A217279 A204478 * A219148 A031532 A168248 Adjacent sequences: A031743 A031744 A031745 * A031747 A031748 A031749 KEYWORD nonn AUTHOR David W. Wilson STATUS approved

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Last modified October 2 21:26 EDT 2023. Contains 365840 sequences. (Running on oeis4.)