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%I
%S 66,166,266,366,466,566,660,766,866,966,1066,1166,1266,1366,1466,1566,
%T 1660,1766,1866,1966,2066,2166,2266,2366,2466,2566,2660,2766,2866,
%U 2966,3066,3166,3266,3366,3466,3566,3660,3766,3866
%N Numbers n such that string 6,6 occurs in the base 10 representation of n but not of n-1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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