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%I #15 Feb 12 2021 22:02:10
%S 1,2,3,4,5,7,8,9,10,12,13,14,16,17,21,22,23,25,26,27,28,30,31,32,36,
%T 37,39,40,41,43,44,48,49,50,52,53,63,64,66,67,68,70,71,75,76,77,79,80,
%U 81,82,84,85,86,90,91,93,94,95,97,98,108,109,111
%N Numbers with the property that all pairs of consecutive base-3 digits differ by 0 or 1.
%H <a href="/index/Ar#3-automatic">Index entries for 3-automatic sequences</a>.
%t Select[Range[120],Max[Abs[Differences[IntegerDigits[#,3]]]]<2&] (* _Harvey P. Dale_, Nov 06 2016 *)
%Y A122975 is a subsequence.
%Y Cf. A007089.
%K nonn,base,easy
%O 1,2
%A _Clark Kimberling_