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%I #7 Oct 08 2020 13:12:37
%S 26,51,76,101,126,134,151,176,201,226,251,259,276,301,326,351,376,384,
%T 401,426,451,476,501,509,526,551,576,601,626,634,674,676,701,726,751,
%U 759,776,801,826,851,876,884,901,926,951,976
%N Numbers n such that string 0,1 occurs in the base 5 representation of n but not of n+1.
%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n,5],{0,1}]>0,1,0],{n,1000}],{1,0}][[All,1]] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Oct 08 2020 *)
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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