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A065007 Integers for which the periodic part of the continued fraction for the square root of n begins with 4. 0

%I

%S 5,18,39,52,68,85,105,126,149,150,175,202,203,232,263,264,296,297,332,

%T 333,369,370,409,410,450,451,493,494,495,539,540,586,587,588,636,637,

%U 687,688,689,740,741,742,796,797,798,853,854,855,913,914,915,974,975

%N Integers for which the periodic part of the continued fraction for the square root of n begins with 4.

%e The continued fraction for the square root of 39 is 6, {4, 12}.

%t Select[ Range[1000], First[ Last[ ContinuedFraction[ Sqrt[ # ]]]] == 4 & ]

%K cofr,easy,nonn

%O 1,1

%A _Robert G. Wilson v_, Nov 01 2001

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Last modified April 18 12:45 EDT 2021. Contains 343088 sequences. (Running on oeis4.)