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 A031818 Period of continued fraction for sqrt(n) contains exactly 50 ones. 0
 3004, 3676, 3691, 4414, 5377, 5413, 5509, 5524, 5692, 5721, 5758, 6009, 6091, 6349, 6541, 6781, 6796, 6871, 6961, 7009, 7041, 7149, 7321, 7609, 7729, 7732, 7996, 8179, 8529, 8617, 8881, 8902, 8929, 8969, 9013, 9172, 9249, 9397, 9589, 9706, 9733, 9851 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..42. MATHEMATICA upto=10000; With[{t=Complement[Range[upto], Range[Floor[Sqrt[ upto]]]^2]}, Select[t, Count[ContinuedFraction[Sqrt[#]][[2]], 1]==50&]] (* Harvey P. Dale, Dec 02 2011 *) CROSSREFS Sequence in context: A140915 A140928 A090162 * A152207 A279584 A004228 Adjacent sequences: A031815 A031816 A031817 * A031819 A031820 A031821 KEYWORD nonn AUTHOR David W. Wilson STATUS approved

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Last modified April 17 01:50 EDT 2024. Contains 371756 sequences. (Running on oeis4.)