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%I
%S 210,210210,212010,212100,221010,221100,210210210,210212010,210212100,
%T 210221010,210221100,212010210,212012010,212012100,212021010,
%U 212021100,212100210,212102010,212102100,212120010,212120100,212121000,212201010
%N Ternary numbers with equal numbers of 0s, 1s and 2s and such that read left-to-right at all times the number of 2s >= number of 1s >= number of 0s.
%C A005789(n) counts the terms here with 3n ternary digits.
%Y Cf. A005789, A063171, A000108.
%K base,nonn
%O 1,1
%A _Rick L. Shepherd_, Oct 14 2007
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