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%I #9 Nov 18 2023 22:24:20
%S 2,4,9,18,34,36,68,72,161,322,323,483,610,644,646,966,1220,1288,1292,
%T 1449,1932,2576,2889,2898,3355,3864,5778,5796,6710,7728,9455,10946,
%U 11556,11592,13420,18910,21892,23112,23184,37820,49113,51841,54891,98226,103682
%N Numbers k such that the period of the continued fraction for sqrt(5)*k is 2.
%H Chai Wah Wu, <a href="/A065030/b065030.txt">Table of n, a(n) for n = 1..289</a>
%t Select[ Range[ 25000], Length[ Last[ ContinuedFraction[ Sqrt[5] *# ]]] == 2 & ]
%Y Cf. A064933.
%K nonn
%O 1,1
%A _Robert G. Wilson v_, Nov 02 2001
%E More terms from _Chai Wah Wu_, Feb 10 2022