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Numbers k such that 3 and 5 occur juxtaposed in the base-10 representation of k but not of k-1.
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%I #8 Aug 23 2021 21:46:36

%S 35,53,135,153,235,253,335,350,435,453,530,553,635,653,735,753,835,

%T 853,935,953,1035,1053,1135,1153,1235,1253,1335,1350,1435,1453,1530,

%U 1553,1635,1653,1735,1753,1835,1853,1935,1953,2035

%N Numbers k such that 3 and 5 occur juxtaposed in the base-10 representation of k but not of k-1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_