%I #10 Jun 14 2022 19:15:11
%S 60,106,160,206,260,306,360,406,460,506,560,609,660,706,760,806,860,
%T 906,960,1006,1069,1106,1160,1206,1260,1306,1360,1406,1460,1506,1560,
%U 1609,1660,1706,1760,1806,1860,1906,1960,2006,2069
%N Numbers k such that 0 and 6 occur juxtaposed in the base-10 representation of k but not of k+1.
%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n],{0,6}]>0 || SequenceCount[ IntegerDigits[n],{6,0}]>0,1,0],{n,2100}],{1,0}][[All,1]] (* _Harvey P. Dale_, Jun 14 2022 *)
%K nonn,base
%O 1,1
%A _Clark Kimberling_