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%I A043946 #11 Aug 26 2021 03:17:11
%S A043946 20,34,84,98,148,167,212,226,279,290,340,354,404,418,468,482,532,546,
%T A043946 596,610,660,679,724,738,791,802,852,866,916,930,980,994,1044,1058,
%U A043946 1108,1122,1172,1191,1236,1250,1343,1364,1378,1428
%N A043946 Numbers k such that 2 and 4 occur juxtaposed in the base-8 representation of k but not of k+1.
%t A043946 SequencePosition[Table[If[SequenceCount[IntegerDigits[n,8],{2,4}]>0 || SequenceCount[IntegerDigits[n,8],{4,2}]>0,1,0],{n,1500}],{1,0}][[All,1]] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Jul 25 2020 *)
%Y A043946 Cf. A007094.
%K A043946 nonn,base
%O A043946 1,1
%A A043946 _Clark Kimberling_

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