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%I #2 Mar 30 2012 17:27:47
%S 2,3,50,75,122,174,183,194,203,291,338,410,507,615,722,794,842,914,
%T 1058,1082,1083,1154,1182,1191,1202,1263,1346,1371,1379,1442,1562,
%U 1572,1587,1623,1682,1703,1731,1778,1803,1922,2018,2019,2066,2163,2343,2354,2426
%N Members of 2-cycles of permutation A111273.
%C Trajectory of n under map k -> A111273(k) is periodic with period length 2.
%C n = A111273(A111273(n)) and n <> A111273(n).
%C Apparently A111273 has infinitely many 2-cycles.
%e A111273(122) = 183 and A111273(183) = 122, hence 122 and 183 are in the
%e sequence.
%Y Cf. A111273, A113659, A113701.
%K nonn
%O 1,1
%A _Klaus Brockhaus_, Nov 08 2005
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