%I #7 Aug 09 2022 10:34:02
%S 46,146,246,346,446,469,546,646,746,846,946,1046,1146,1246,1346,1446,
%T 1469,1546,1646,1746,1846,1946,2046,2146,2246,2346,2446,2469,2546,
%U 2646,2746,2846,2946,3046,3146,3246,3346,3446,3469
%N Numbers n such that string 4,6 occurs in the base 10 representation of n but not of n+1.
%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n],{4,6}]>0,1,0],{n,4000}],{1,0}][[All,1]] (* _Harvey P. Dale_, Aug 09 2022 *)
%K nonn,base
%O 1,1
%A _Clark Kimberling_