Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #14 Aug 07 2017 09:39:42
%S 11,40,87,128,152,232,235,266,300,335,336,373,455,498,544,592,747,848,
%T 860,914,920,1110,1111,1248,1320,1392,1393,1547,1700,1707,1708,1790,
%U 1792,1876,1953,2055,2240,2335,2336,2632,2635,2829,2844,2952
%N Least term in period of continued fraction for sqrt(n) is 3.
%H Charles R Greathouse IV, <a href="/A031427/b031427.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 from Vincenzo Librandi)
%t Select[Range[3000], !IntegerQ[Sqrt[#]] && Min[ContinuedFraction[Sqrt[#]][[2]]] == 3&] (* _Vincenzo Librandi_, Feb 06 2012 *)
%K nonn
%O 1,1
%A _David W. Wilson_