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Numbers k such that 1 and 3 occur juxtaposed in the base-9 representation of k but not of k-1.
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%I #9 Aug 23 2021 01:06:58

%S 12,28,93,108,174,190,252,271,336,352,417,433,498,514,579,595,660,676,

%T 741,757,822,837,903,919,972,1065,1081,1146,1162,1227,1243,1308,1324,

%U 1389,1405,1470,1486,1551,1566,1632,1648,1710

%N Numbers k such that 1 and 3 occur juxtaposed in the base-9 representation of k but not of k-1.

%Y Cf. A007095.

%K nonn,base

%O 1,1

%A _Clark Kimberling_