A043125 - OEIS

%I #10 Feb 25 2023 11:49:32

%S 15,20,51,56,87,90,120,128,159,164,195,200,231,236,267,272,303,306,

%T 336,344,375,380,411,416,447,452,483,488,519,522,540,591,596,627,632,

%U 663,668,699,704,720,768,776,807,812,843,848,879

%N Numbers k such that 2 and 3 occur juxtaposed in the base-6 representation of k but not of k-1.

%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n,6],{2,3}]>0 || SequenceCount[ IntegerDigits[n,6],{3,2}]>0,1,0],{n,900}],{0,1}][[;;,2]] (* _Harvey P. Dale_, Feb 25 2023 *)

%Y Cf. A007092.

%K nonn,base

%O 1,1

%A _Clark Kimberling_