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%I #9 Aug 29 2021 01:59:24
%S 78,87,178,187,278,287,378,387,478,487,578,587,678,687,778,789,879,
%T 887,978,987,1078,1087,1178,1187,1278,1287,1378,1387,1478,1487,1578,
%U 1587,1678,1687,1778,1789,1879,1887,1978,1987,2078
%N Numbers k such that 7 and 8 occur juxtaposed in the base-10 representation of k but not of k+1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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