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A031621 Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 33. 0

%I #14 Aug 18 2021 00:10:32

%S 2509,13738,23185,61729,64234,79813,80378,81514,83233,98957,101485,

%T 102761,147218,150298,151073,152629,171194,172021,175349,176186,

%U 177866,178709,180401,205033,231241,233165,235097,238985,263105,265157,267217

%N Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 33.

%Y Subsequence of A003814.

%K nonn

%O 1,1

%A _David W. Wilson_

%E First term 1090 removed by _Georg Fischer_, Jun 16 2019

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Last modified April 19 17:39 EDT 2024. Contains 371797 sequences. (Running on oeis4.)