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 A031841 Period of continued fraction for sqrt(n) contains exactly 73 ones. 0
 45799, 56323, 61831, 78247, 99811, 106387, 133003, 136315, 139807, 147715, 150331, 151139, 162559, 162835, 174399, 178363, 188031, 188871, 192376, 198535, 206259, 215431, 216863, 219007, 221779, 225496, 225592, 227859, 230039, 233815, 239896 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA cf73Q[n_]:=Module[{sqr=Sqrt[n]}, !IntegerQ[sqr] && Count[ ContinuedFraction[ sqr] [[2]], 1]==73]; Select[Range[250000], cf73Q] (* Harvey P. Dale, Nov 23 2012 *) CROSSREFS Sequence in context: A202915 A257358 A232255 * A031635 A159725 A210306 Adjacent sequences: A031838 A031839 A031840 * A031842 A031843 A031844 KEYWORD nonn AUTHOR STATUS approved

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Last modified November 26 17:30 EST 2022. Contains 358362 sequences. (Running on oeis4.)