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 A020402 Numbers n such that continued fraction for sqrt(n) has period 63. 0
 1801, 2161, 2281, 2749, 3389, 3457, 3673, 5161, 5381, 5441, 5801, 6277, 6917, 7969, 10489, 11093, 11177, 11185, 12893, 13397, 14954, 16453, 17657, 17770, 18541, 18554, 21509, 22985, 23825, 23873, 24113, 25882, 25909, 26186, 27185, 27785, 28306, 28453 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA p63Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], 0, Length[ContinuedFraction[s] [[2]]]] == 63]; Select[Range[30000], p63Q] (* Harvey P. Dale, Apr 17 2015 *) CROSSREFS Sequence in context: A025139 A035767 A107563 * A180685 A222418 A252676 Adjacent sequences:  A020399 A020400 A020401 * A020403 A020404 A020405 KEYWORD nonn AUTHOR STATUS approved

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Last modified May 22 00:25 EDT 2019. Contains 323472 sequences. (Running on oeis4.)