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%I #3 Mar 31 2012 13:46:50
%S 1,4,7,41,42,43,47,49,51,52,53,57,59,61,62,63,67,69,414,741,4141,4142,
%T 4143,4147,4149,4151,4152,4153,4157,4159,4161,4162,4163,4167,4169,
%U 4241,4242,4243,4247,4249,4251,4252,4253,4257,4259,4261,4262,4263,4267,4269
%N An "L" digit is a digit "looking to the Left" (1,2,3,7,9); an "R" digit is a digit "looking to the Right" (4,5,6); an "U" digit is a digit "looking at Us" (0,8). This is the slowest increasing sequence showing the infinite pattern [LR] (when read digit-by-digit).
%C The equivalent sequence showing the [RL] pattern is the same as this one, but without the first element (1) -- thus starting with (4).
%K nonn,base
%O 1,2
%A _Eric Angelini_, May 10 2004
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