A044238 - OEIS

%I #10 Aug 10 2025 20:53:50

%S 51,115,179,243,307,371,408,435,499,563,627,691,755,819,883,920,947,

%T 1011,1075,1139,1203,1267,1331,1395,1432,1459,1523,1587,1651,1715,

%U 1779,1843,1907,1944,1971,2035,2099,2163,2227,2291,2355

%N Numbers k such that string 6,3 occurs in the base 8 representation of k but not of k-1.

%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n,8],{6,3}]>0,1,0],{n,2500}],{0,1}][[;;,2]] (* _Harvey P. Dale_, Feb 18 2024 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_