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Numbers k such that 1 and 3 occur juxtaposed in the base-7 representation of k but not of k+1.
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%I #7 Aug 25 2021 05:06:47

%S 10,22,59,76,108,120,160,169,206,218,255,267,304,316,353,365,402,419,

%T 451,463,538,549,561,598,610,647,659,696,708,745,762,794,806,846,855,

%U 892,904,941,953,990,1002,1039,1051,1126,1137

%N Numbers k such that 1 and 3 occur juxtaposed in the base-7 representation of k but not of k+1.

%Y Cf. A007093.

%K nonn,base

%O 1,1

%A _Clark Kimberling_