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Numbers k such that 7 and 8 occur juxtaposed in the base-9 representation of k but not of k-1.
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%I #9 Aug 23 2021 02:56:14

%S 71,79,152,160,233,241,314,322,395,403,476,484,557,565,638,711,727,

%T 800,808,881,889,962,970,1043,1051,1124,1132,1205,1213,1286,1294,1367,

%U 1440,1456,1529,1537,1610,1618,1691,1699,1772,1780

%N Numbers k such that 7 and 8 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_