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A031432 Least term in period of continued fraction for sqrt(n) is 8. 1

%I

%S 17,66,147,260,405,582,791,1032,1305,1610,1690,1947,2316,2717,3150,

%T 3615,4112,4641,4778,5202,5795,6420,7077,7413,7766,8487,9240,10025,

%U 10842,11691,12572,13244,13485,14430,14671,15407,16416,16673,17457

%N Least term in period of continued fraction for sqrt(n) is 8.

%C 16*m^2 + m for m >= 1 are terms of this sequence (see comment in A031742). The first term that is not of this form is a(11) = 1690. - _Chai Wah Wu_, Jun 19 2016

%H Charles R Greathouse IV, <a href="/A031432/b031432.txt">Table of n, a(n) for n = 1..10000</a> (first 200 from Vincenzo Librandi)

%t Select[Range[20000],!IntegerQ[Sqrt[#]] && Min[ContinuedFraction[Sqrt[#]][[2]]] == 8&] (* _Vincenzo Librandi_, Feb 07 2012 *)

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified July 27 05:26 EDT 2021. Contains 346305 sequences. (Running on oeis4.)