%I #6 Jul 27 2019 10:07:27
%S 3,31,103,113,123,133,143,153,163,173,183,193,203,303,311,403,503,603,
%T 703,803,903,1031,1131,1231,1331,1431,1531,1631,1731,1831,1931,2031,
%U 3031,3100,3110,3111,3112,3113,3114,3115,3116,3117,3118,3119,3120,3130,3140
%N Numbers which converge to 3 under repeated application of the powertrain map of A133500.
%e 31 -> 3^1 = 3.
%Y Cf. A133500, A133501, A135384, A135385, A309385, A326733, A326734, A326735, A326737, A326738, A326739, A326740, A326741, A326742.
%K nonn,base,easy
%O 1,1
%A _Martin Renner_, Jul 22 2019