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%I #7 Jun 20 2019 15:44:31
%S 84,165,246,327,408,489,570,651,732,756,813,894,975,1056,1137,1218,
%T 1299,1380,1461,1485,1542,1623,1704,1785,1866,1947,2028,2109,2190,
%U 2214,2271,2352,2433,2514,2595,2676,2757,2838,2919
%N Numbers n such that string 0,3 occurs in the base 9 representation of n but not of n-1.
%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n,9],{0,3}]>0,1,0],{n,3000}],{0,1}][[All,2]] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Jun 20 2019 *)
%K nonn,base
%O 1,1
%A _Clark Kimberling_