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Numbers k such that 3 and 5 occur juxtaposed in the base-9 representation of k but not of k+1.
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%I #11 Jul 21 2024 16:28:04

%S 32,48,113,129,194,210,275,296,356,372,440,453,518,534,599,615,680,

%T 696,761,777,842,858,923,939,1004,1025,1085,1101,1169,1182,1247,1263,

%U 1328,1344,1409,1425,1490,1506,1571,1587,1652,1668

%N Numbers k such that 3 and 5 occur juxtaposed in the base-9 representation of k but not of k+1.

%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n,9],{3,5}]>0 || SequenceCount[ IntegerDigits[n,9],{5,3}]>0,1,0],{n,1700}],{1,0}][[;;,1]] (* _Harvey P. Dale_, Jul 21 2024 *)

%Y Cf. A007095.

%K nonn,base

%O 1,1

%A _Clark Kimberling_