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%I #9 Aug 27 2021 01:45:26
%S 61,69,142,150,223,231,304,312,385,393,466,474,547,557,629,636,709,
%T 717,790,798,871,879,952,960,1033,1041,1114,1122,1195,1203,1276,1286,
%U 1358,1365,1438,1446,1519,1527,1600,1608,1681,1689
%N Numbers k such that 6 and 7 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_
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